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https://api.github.com/repos/pandas-dev/pandas/issues/8301
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43,059,718
MDExOlB1bGxSZXF1ZXN0MjEzOTQ1Njg=
8,301
VIS: default LinePlot rotation of 0
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10
2014-09-17T20:41:41Z
2014-09-19T17:04:47Z
2014-09-19T17:04:46Z
CONTRIBUTOR
null
Closes https://github.com/pydata/pandas/issues/8150 ``` python In [1]: s = pd.Series([1,2,3]) In [2]: s.plot() Out[2]: <matplotlib.axes._subplots.AxesSubplot at 0x10da02d68> ``` ![ex](https://cloud.githubusercontent.com/assets/1312546/4310965/f43fd70c-3eaa-11e4-9e2a-aed38bd73ae3.png) No release notes since this is just changing it back to how it was for the last release.
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https://api.github.com/repos/pandas-dev/pandas/issues/8302
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MDU6SXNzdWU0MzA2MzY2NA==
8,302
API: add level kwarg for Series.any/.all
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7
2014-09-17T21:23:14Z
2014-11-11T14:32:45Z
2014-11-11T14:32:45Z
CONTRIBUTOR
null
It appears that Series' `s.any` and `s.all` methods miss level kwargs, unlike their statistical counterparts like `s.sum`: ``` python In [4]: s = pd.Series([0,1,2], index=[0,0,1]) In [5]: s.sum(level=0) Out[5]: 0 1 1 2 dtype: int64 In [6]: s.prod(level=0) Out[6]: 0 0 1 2 dtype: int64 In [7]: s.any(level=0) --------------------------------------------------------------------------- TypeError Traceback (most recent call last) <ipython-input-7-1d8c43752bc9> in <module>() ----> 1 s.any(level=0) /home/immerrr/sources/pandas/pandas/core/series.pyc in f(self, *args, **kwargs) 74 @Appender(func.__doc__) 75 def f(self, *args, **kwargs): ---> 76 result = func(self.values, *args, **kwargs) 77 if isinstance(result, (pa.Array, Series)) and result.ndim == 0: 78 # return NumPy type TypeError: _any() got an unexpected keyword argument 'level' In [8]: s.all(level=0) --------------------------------------------------------------------------- TypeError Traceback (most recent call last) <ipython-input-8-bca0491001a6> in <module>() ----> 1 s.all(level=0) /home/immerrr/sources/pandas/pandas/core/series.pyc in f(self, *args, **kwargs) 74 @Appender(func.__doc__) 75 def f(self, *args, **kwargs): ---> 76 result = func(self.values, *args, **kwargs) 77 if isinstance(result, (pa.Array, Series)) and result.ndim == 0: 78 # return NumPy type TypeError: _all() got an unexpected keyword argument 'level' ``` Frames have those and I think so should series. Maybe, there are more reduction methods that I know not of that also miss those...
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43,066,099
MDU6SXNzdWU0MzA2NjA5OQ==
8,303
subset keyword argument will include last column if incorrect keys are given
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13
2014-09-17T21:47:42Z
2014-09-26T14:35:18Z
2014-09-26T14:35:18Z
NONE
null
If you give a non-existent key to the subset argument it will default to the last column. For example: ``` In [3]: d = pd.DataFrame({'a':[1],'b':[2],'c':[np.nan]}) In [4]: len(d.dropna(subset=['x'])) Out[4]: 0 ``` It seems the problem is in the line where dropna takes the subset: ``` agg_obj = self.take(ax.get_indexer_for(subset),axis=agg_axis) ``` Here, `ax.get_indexer_for(subset)` will return `-1` as a sentinel value for any keys that were not found in `subset`, and `self.take` interprets the `-1` as a request for the last column.
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8,304
to_clipboard() locks clipboard system-wide on exception
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2014-09-17T22:19:13Z
2015-10-20T22:41:57Z
2015-10-20T22:41:57Z
CONTRIBUTOR
null
Exception in the following code locks clipboard system-wide until I exit my interactive Python session: ``` python import pandas as pd df = pd.DataFrame.from_dict({1: u' \u2014'}, 'index') df.to_clipboard() --------------------------------------------------------------------------- UnicodeEncodeError Traceback (most recent call last) <ipython-input-58-1f8b11f0ff98> in <module>() ----> 1 df.to_clipboard() C:\Python27\lib\site-packages\pandas\core\generic.pyc in to_clipboard(self, excel, sep, **kwargs) 1000 from pandas.io import clipboard -> 1001 clipboard.to_clipboard(self, excel=excel, sep=sep, **kwargs) 1002 1003 #---------------------------------------------------------------------- C:\Python27\lib\site-packages\pandas\io\clipboard.pyc in to_clipboard(obj, excel, sep, **kwargs) 95 else: 96 objstr = str(obj) ---> 97 clipboard_set(objstr) C:\Python27\lib\site-packages\pandas\util\clipboard.pyc in winSetClipboard(text) 63 try: 64 # works on Python 2 (bytes() only takes one argument) ---> 65 hCd = ctypes.windll.kernel32.GlobalAlloc(GMEM_DDESHARE, len(bytes(text))+1) 66 except TypeError: 67 # works on Python 3 (bytes() requires an encoding) UnicodeEncodeError: 'ascii' codec can't encode character u'\u2014' in position 10: ordinal not in range(128) ``` pandas 0.14.1
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8,305
to_clipboard(excel=False) truncates strings to 50 characters
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9
2014-09-17T22:41:20Z
2014-09-23T14:40:59Z
2014-09-23T14:40:59Z
CONTRIBUTOR
null
I hope this is not intended as I can't find the point in this behavior: ``` python import pandas as pd df = pd.DataFrame.from_dict({1: ''.join(['1234567890'] * 6)}, 'index') df.to_clipboard(excel=False) ``` result copied to clipboard: ``` 0 1 1234567890123456789012345678901234567890123456... ``` Another issue - trying to omit index: ``` python df.to_clipboard(excel=False, index=False) ``` result copied to clipboard, just the same as previous (with index): ``` 0 1 1234567890123456789012345678901234567890123456... ``` This doesn't happen if I leave `excel` parameter to default value.
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43,122,904
MDU6SXNzdWU0MzEyMjkwNA==
8,306
ERR: raise in tz incompat with DatetimeIndex ops
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13
2014-09-18T11:35:40Z
2018-06-18T22:34:30Z
2018-06-18T22:34:30Z
CONTRIBUTOR
null
xref #6552 ``` idx = pd.date_range(..., tz='UTC') idx2 = idx.reindex(pd.date_range(..., tz='US/Pacific') ``` - [ ] subtraction of datetime like - [ ] intersection / union / difference - [ ] reindex
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MDExOlB1bGxSZXF1ZXN0MjE0MzIwODI=
8,307
VIS: Hide labels for NaN/zeros in boxplt [WIP]
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7
2014-09-18T13:14:37Z
2014-09-25T18:41:36Z
2014-09-25T16:55:01Z
CONTRIBUTOR
null
Closes: https://github.com/pydata/pandas/issues/8198 The idea is to hide the labels around the pie plot so they don't overlap w/ nonzero labels. The NaN/zero labels should still be visible in the legend to indicate that there's missing data. There's a picture of the problem in the linked issue. NaNs in the top row of plots: ``` In [1]: df = pd.DataFrame(np.random.rand(4, 4)) In [2]: df2 = df.copy() In [3]: for i in range(len(df)): ...: df.iloc[i, i] = np.nan ...: In [4]: fig, axes = plt.subplots(figsize=(16, 8), nrows=2, ncols=4) In [5]: df.plot(kind='pie', subplots=True, ax=axes.ravel()[:4]) In [6]: df2.plot(kind='pie', subplots=True, ax=axes.ravel()[4:]) ``` ![ex](https://cloud.githubusercontent.com/assets/1312546/4320249/881bf944-3f35-11e4-85c8-bb5c4d539435.png) Right now, for **DataFrames only** the NaN/zero labels aren't being put in the legend (or they aren't showing up). Still need to figure out why. It works fine for Series: ``` In [8]: df[0].plot(kind='pie', figsize=(4,4), legend=True) ``` ![ex2](https://cloud.githubusercontent.com/assets/1312546/4320269/b75df6ee-3f35-11e4-9774-50f8aed26594.png)
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8,308
DOC: Use square plots for Pie Plots
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2
2014-09-18T14:28:07Z
2014-10-04T15:19:50Z
2014-10-04T15:19:50Z
CONTRIBUTOR
null
They look funny because the aspect ratio is off: http://pandas-docs.github.io/pandas-docs-travis/visualization.html#pie-plot May also want to note that in the text also. This would be great for a first pull request if anyone is interested. Just need to set the figsize to something like (8, 8) for each plot (or (16, 8) for the subplots example). Everything is in `doc/source/visualization.rst`
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8,309
pandas.cut crashes on all zero input
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2018-07-06T22:14:58Z
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NONE
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xref #7751 ``` python import pandas as pd pd.cut([0,0,0,0], 10) ``` result: ``` ValueError: Bin edges must be unique: array([ 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0.]) ``` On the other hand, pandas.cut works on non-unique inputs other than zero. The culprit are the following [lines of code in tile.py](https://github.com/pydata/pandas/blob/v0.14.1/pandas/tools/tile.py#L89-L90): ``` python if mn == mx: # adjust end points before binning mn -= .001 * mn mx += .001 * mx bins = np.linspace(mn, mx, bins + 1, endpoint=True) ``` When `mn` and `mx` are zero, the adjustment isn't made. --- ``` >>> pd.show_versions() INSTALLED VERSIONS ------------------ commit: None python: 2.7.6.final.0 python-bits: 64 OS: Linux OS-release: 2.6.32-300.3.1.el6uek.x86_64 machine: x86_64 processor: x86_64 byteorder: little LC_ALL: None LANG: en_US.UTF-8 pandas: 0.14.1 nose: 1.3.1 Cython: None numpy: 1.9.0 scipy: 0.14.0 statsmodels: None IPython: 2.0.0 sphinx: None patsy: None scikits.timeseries: None dateutil: 2.2 pytz: 2014.4 bottleneck: None tables: None numexpr: None matplotlib: 1.3.1 openpyxl: None xlrd: None xlwt: None xlsxwriter: None lxml: None bs4: None html5lib: None httplib2: None apiclient: None rpy2: 2.4.2 sqlalchemy: None pymysql: None psycopg2: None ```
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https://api.github.com/repos/pandas-dev/pandas/issues/8310
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43,159,904
MDU6SXNzdWU0MzE1OTkwNA==
8,310
IndexError when indexing into numpy array using a Series
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1
2014-09-18T17:47:54Z
2014-09-18T17:53:18Z
2014-09-18T17:52:48Z
NONE
null
I'm getting a weird error in 0.14.1 that i didn't have in 0.10.1 ``` python >>> import numpy as np >>> import pandas >>> np.__version__ Out[8]: '1.8.2' >>> pandas.__version__ Out[9]: '0.14.1' >>> a = np.arange(10) >>> b = pandas.Series([1,2,3]) >>> a[b] Traceback (most recent call last): File "C:\Python27\lib\site-packages\IPython\core\interactiveshell.py", line 2746, in run_code exec code_obj in self.user_global_ns, self.user_ns File "<ipython-input-17-a686c4bc0a37>", line 1, in <module> a[b] IndexError: unsupported iterator index ``` I would have expected to get something like array([1,2,3]), note this works if i use `.values` ``` python >>> a[b.values] Out[20]: array([1, 2, 3]) ``` This would print out as expected in 0.10.1: ``` python In [28]: numpy.__version__ Out[28]: '1.6.2' In [29]: pandas.__version__ Out[29]: '0.10.1' In [30]: a = numpy.arange(10) In [31]: b = pandas.Series([1,2,3]) In [32]: a[b] Out[32]: array([1, 2, 3]) ``` Any ideas?
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43,167,050
MDU6SXNzdWU0MzE2NzA1MA==
8,311
Series constructor doesn't handle object implementing numpy array interface
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7
2014-09-18T19:02:22Z
2015-10-20T23:12:24Z
2015-10-20T23:12:24Z
CONTRIBUTOR
null
``` python In [1]: import pandas as pd In [2]: import rpy2 In [7]: import numpy as np In [4]: arr = rpy2.robjects.IntVector(range(10)) In [5]: arr Out[5]: <IntVector - Python:0x102ed3908 / R:0x105a7c178> [ 0, 1, 2, ..., 7, 8, 9] In [6]: pd.Series(arr) # wrong behavior Out[6]: 0 [0, 1, 2, 3, 4, 5, 6, 7, 8, 9] dtype: object In [9]: np.array(arr) Out[9]: array([0, 1, 2, 3, 4, 5, 6, 7, 8, 9], dtype=int32) In [10]: pd.Series(np.array(arr)) # correct behavior Out[10]: 0 0 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 dtype: int32 ``` I guess this is a regression due to Series no longer being a subclass of np.ndarray. Not sure if `numpy` exposes a catchall `isarray` that does the checks.
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43,167,854
MDU6SXNzdWU0MzE2Nzg1NA==
8,312
VIS/DOC: clean-up plots in the docs
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7
2014-09-18T19:10:38Z
2014-10-04T18:53:43Z
2014-10-04T18:01:29Z
MEMBER
null
This is of course taste, but I personally find some of the plots on the docs not very pleasing to the eyes. Some different things: - [x] Too dense minor gridlines (solved by using mpl 1.4): - Eg the first plot on the page: http://pandas-docs.github.io/pandas-docs-travis/visualization.html#basic-plotting-plot - It becomes worse when the plots become smaller: http://pandas-docs.github.io/pandas-docs-travis/visualization.html#using-layout-and-targetting-multiple-axes - This could be solved using the new matplotlib styles or adapting our own `options.display.mpl_default` style - [x] Overlapping axis labels (see also comment from here: https://github.com/pydata/pandas/pull/8301#issuecomment-56084391) (https://github.com/pydata/pandas/pull/8391): - See the examples with multiple axes: http://pandas-docs.github.io/pandas-docs-travis/visualization.html#using-layout-and-targetting-multiple-axes -> a lot of overlapping axis labels - [x] Use square pie plots (https://github.com/pydata/pandas/pull/8391) - ...
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43,170,353
MDU6SXNzdWU0MzE3MDM1Mw==
8,313
API: rolling_* functions should have default window arg of None
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10
2014-09-18T19:38:59Z
2016-11-13T17:51:05Z
2016-11-13T17:51:05Z
CONTRIBUTOR
null
I could be missing an easier way, but a lot of times I want to apply a rolling function to something like a groupby. This isn't the easiest thing in the world since the rolling functions take 2 arguments and `groupby.apply` is expecting a function with one argument. Maybe there's some way with passing in `args` to `groupby.apply`, but I can never remember what exactly get passed where, and what needs to be in tuples. The most intuitive way (for me) is to make the function being applied, `f`, a function of one argument (the grouped values). This is difficult/impossible with the rolling funcs since there are 2 positional arguments and we want to `partial` the second. You have go through hoops with flipping function arguments, `partial`ing, and flipping back. meh... I've got a patch that would allow ``` python In [1]: df = pd.DataFrame(np.random.randn(100, 4)) In [2]: df['g'] = np.random.randint(0, 3, size=(100)) In [3]: from functools import partial In [4]: f = partial(pd.rolling_mean, window=4) In [5]: df.groupby('g').apply(f) ``` This is fully backwards compatible since it just raises if window is None. Any reason not to?
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8,314
Allow preservation of object dtype when convert_numeric=True
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2014-09-18T23:01:23Z
2014-09-19T00:11:10Z
2014-09-19T00:11:10Z
MEMBER
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8,315
Can't run in optimized mode on Ubuntu
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2
2014-09-19T00:03:36Z
2014-12-04T08:27:53Z
2014-12-04T08:27:53Z
NONE
null
If I start python with a -O flag, I get an error as soon as I import pandas ``` python python -O Python 2.7.6 (default, Mar 22 2014, 22:59:56) [GCC 4.8.2] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import pandas as pd Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/home/username/.virtualenvs/thm/local/lib/python2.7/site-packages/pandas/__init__.py", line 45, in <module> from pandas.io.api import * File "/home/username/.virtualenvs/thm/local/lib/python2.7/site-packages/pandas/io/api.py", line 11, in <module> from pandas.io.sql import read_sql, read_sql_table, read_sql_query File "/home/username/.virtualenvs/thm/local/lib/python2.7/site-packages/pandas/io/sql.py", line 1243, in <module> read_frame.__doc__ += read_sql.__doc__ TypeError: unsupported operand type(s) for +=: 'NoneType' and 'NoneType' ``` The lines causing the issue are: ``` python # Append wrapped function docstrings read_frame.__doc__ += read_sql.__doc__ frame_query.__doc__ += read_sql.__doc__ ``` It appears as if python is stripping the docstrings, which then causes issues. Commenting the lines out fixes the problem. I'm on Ubuntu 14.04.1 LTS, my version info is: ``` python >>> pd.show_versions() INSTALLED VERSIONS ------------------ commit: None python: 2.7.6.final.0 python-bits: 64 OS: Linux OS-release: 3.13.0-29-generic machine: x86_64 processor: x86_64 byteorder: little LC_ALL: None LANG: en_US.UTF-8 pandas: 0.14.1 nose: 1.3.0 Cython: None numpy: 1.8.0 scipy: 0.9.0 statsmodels: None IPython: None sphinx: None patsy: None scikits.timeseries: None dateutil: 2.2 pytz: 2013.9 bottleneck: 0.8.0 tables: None numexpr: 2.4 matplotlib: None openpyxl: None xlrd: None xlwt: None xlsxwriter: None lxml: None bs4: None html5lib: None httplib2: None apiclient: None rpy2: None sqlalchemy: 0.9.7 pymysql: None psycopg2: None ```
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8,316
BUG: Exception raised when `to_sql` used to insert empty dataframe
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1
2014-09-19T00:13:00Z
2014-09-19T09:21:07Z
2014-09-19T09:21:07Z
CONTRIBUTOR
null
Right now, if inserting an empty table (no rows) using `to_sql`, the following exception is raised: ``` ... File "/Users/artemy/dev/pandas/pandas/io/sql.py", line 1220, in to_sql table.insert(chunksize) File "/Users/artemy/dev/pandas/pandas/io/sql.py", line 659, in insert chunks = int(nrows / chunksize) + 1 ZeroDivisionError: division by zero ``` This fixes this bug and adds tests for it.
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8,317
CLN: Generalized PEP8 Enforcement
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2
2014-09-19T02:33:28Z
2015-12-30T15:19:43Z
2015-12-30T15:19:43Z
CONTRIBUTOR
null
Per @jorisvandenbossche (https://github.com/pydata/pandas/pull/8286#issuecomment-56043336), we need to discuss a generalized way of enforcing PEP8 on the entire pandas code base. Matplotlib has something similar here: https://github.com/matplotlib/matplotlib/blob/master/lib/matplotlib/tests/test_coding_standards.py, and here's the PR discussion: https://github.com/matplotlib/matplotlib/pull/1945 Some discussion is probably needed on the PEP8 rules we're alright with ignoring as well as whether or not we want to use 80 or 100 lines for max-line-length (http://legacy.python.org/dev/peps/pep-0008/#maximum-line-length).
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8,318
Indexing issue for dataframes with duplicate indexes
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2
2014-09-19T04:23:34Z
2014-09-19T16:44:58Z
2014-09-19T12:01:11Z
CONTRIBUTOR
null
Consider: df1 = DataFrame(np.arange(9.).reshape((3, 3)), columns=list('bcd'), index=['a', 'a', 'c']) Then, df1.loc[['a','c'],['b','c']] results in a key error while, df1.loc[['a','c'],:].loc[:,['b','c']] produces the intended result.
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8,319
ENH: add option to HDFStore.put/append to optionally store the index of the object (default for back compat is True)
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1
2014-09-19T14:17:47Z
2020-04-10T02:36:09Z
null
CONTRIBUTOR
null
``` store.append(df,'df',write_index=True) ``` makes sense (`index` is already taken as its passed thru to determine whether to create an actual on in the table)
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8,320
BUG: Bug in .at that would accept integer indexers on a non-integer index and do fallback (GH7814)
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0
2014-09-19T15:04:14Z
2014-09-19T15:40:59Z
2014-09-19T15:40:59Z
CONTRIBUTOR
null
closes #7814
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ENH: Add Numpy Array Interface support to Pandas objects
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2015-05-09T15:58:57Z
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CONTRIBUTOR
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WIP
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2014-09-19T17:04:28Z
2014-09-19T20:05:55Z
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CONTRIBUTOR
null
closes #7704
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2014-09-19T19:26:33Z
2014-12-01T00:55:51Z
2014-12-01T00:55:51Z
CONTRIBUTOR
null
Contributing Guidlines / Help: https://github.com/pydata/pandas/wiki Dev Docs http://pandas-docs.github.io/pandas-docs-travis/whatsnew.html Docs: - Doc Strings examples/links: https://github.com/pydata/pandas/issues/3439, https://github.com/pydata/pandas/issues/2916, https://github.com/pydata/pandas/issues/3324 - ~~Docs on ipython startup files: #5748~~ - Links to API docs in the tutorials: https://github.com/https://github.com/pydata/pandas/issues/3705, #1967 - better docs on DataFrame.apply (examples): https://github.com/pydata/pandas/issues/5299 - ~~GA docs: https://github.com/pydata/pandas/issues/3508~~ - doc groupby NA group work-around: https://github.com/pydata/pandas/issues/5456 - consistent imports in all documentation: #1967 - DOC: improve groupby reference docs #6944 - documenting cython class (eg Timestamp): "cyfunction is not a python function" #5218 - Redesigning/reorganising the documentation website Perf: - ~~vbench on different group sizes: https://github.com/pydata/pandas/issues/6787~~ - use seed in vbenches: https://github.com/pydata/pandas/issues/8144 - pandas + [airspeed velocity](https://spacetelescope.github.io/asv/index.html) #8361 Tests: - matplotlib lib to check plots: https://github.com/pydata/pandas/issues/5379 - harmonize testing namespace: https://github.com/pydata/pandas/issues/8023 - verify timedelta algos: https://github.com/pydata/pandas/issues/5986 - non_unique storage tests for HDFStore: https://github.com/pydata/pandas/issues/7813 Bugs: - Make changes in numpy API for 1.7: https://github.com/pydata/pandas/issues/8329 - accept scalar in Panel construction: https://github.com/pydata/pandas/issues/8285 - fillna bug: https://github.com/pydata/pandas/issues/8251 - HDFStore modifying columns when passed: https://github.com/pydata/pandas/issues/7212 - Plot label = None instead of provided label in line plot #8905 - plot with kind=scatter fails when providing an array for the size #8852 - Grouper(key='A') gives AttributeError when applying function #8795 - ValueError exception with pd.resample #8683 - to_csv issue with chunksize when large number of columns #8621 - EASY: pd.option_context without 'with' changes option values #8514 Enhancements: - ENH: support TimedeltaIndex plotting #8711 - as suggested below, an enhancement to `read_csv` (or maybe `read_repr/string` to allow round-triping of the repr (can also serve as a basis for `read_clipboard`) - raise on invalid compression options in HDFStore: https://github.com/pydata/pandas/issues/4582 - ~~accept Period in DatetimeIndex for start/end: https://github.com/pydata/pandas/issues/6780~~ - dont use bare Exceptions: https://github.com/pydata/pandas/issues/7948 - add more Series/Index ops: https://github.com/pydata/pandas/issues/6382 - ~~to_dict orient parm: https://github.com/pydata/pandas/issues/7840~~ - sort_index to generic.py: https://github.com/pydata/pandas/issues/8283 - get to take an axis argument: https://github.com/pydata/pandas/issues/6703 - axis argument to append: https://github.com/pydata/pandas/issues/8295 - better error on invalid input to cut: https://github.com/pydata/pandas/issues/7751 - ~~level kw to any/all: https://github.com/pydata/pandas/issues/8302~~ - astype accepting a dict: https://github.com/pydata/pandas/issues/7271 - ~~clean up code by removing core/array.py: https://github.com/pydata/pandas/issues/8359~~ IO: - to_clipboard bug/improvements: https://github.com/pydata/pandas/issues/8304 - to_html to actually create links: https://github.com/pydata/pandas/issues/2679, https://github.com/pydata/pandas/issues/6488, https://github.com/pydata/pandas/issues/4987 - max_colwidth with groupby: https://github.com/pydata/pandas/issues/7856 - date_formatting in to_csv not being passed thru: https://github.com/pydata/pandas/issues/7791 - generate gbq schema: https://github.com/pydata/pandas/issues/8325 - make `to_latex` work with multi-index: https://github.com/pydata/pandas/issues/8336 - `Series.to_html` not working so well: https://github.com/pydata/pandas/issues/5563 - to_csv issue with chunksize when large number of columns #8621 Excel Oriented: - More customization of Excel input/output could be great, i.e. making it easier to specify per-column colors/formatting, float formats, etc. The code base isn't too complicated there (just a mixture of the formatter and the ExcelWriter stuff) and you could make rapid progress because it's really easy to test and create samples. I think the result would be very immediately rewarding (better looking things, easier to make reports, etc.). Plus for #4679 and #8272 you'd get a better sense of pandas internals too. - dtypes per column in read in (#8212 and #8272) - Treat multiple rows/columns as MultiIndex/hierarchical columns #4679 - More flexible output formatting for Excel (mentioned in #8191 , but I'm going to put up an issue about having something like per-column styles, also #1663). - Allow writing multiple tables to same sheet and/or setting starting position for a particular sheet (mentioned by Wes in an older issue but I can't find it right now). - extend excel writers to write to open document format #2311 - allow ExcelWriter to automatically convert lists and dict to string #8188 - Performance benchmarks for Excel writers and readers #7171 - Support BytesIO output in ExcelWriter #7074 SQL: - ENH: specify dtype in `to_sql` per column: #8778 - BUG: to_sql fails with datetime.time values with sqlite fallback mode #8341 More advanced: - add write_index option to HDFStore: https://github.com/pydata/pandas/issues/8319 - start/stop on HDFstore fixed: https://github.com/pydata/pandas/issues/8287 - block splitting in HDFStore: https://github.com/pydata/pandas/issues/8284 - tz handling using HDFStore / fixed: https://github.com/pydata/pandas/issues/8165, https://github.com/pydata/pandas/issues/7775 - PeriodIndex in HDFStore: https://github.com/pydata/pandas/issues/7796 - Write meta data as a CArray: https://github.com/pydata/pandas/issues/6245 - Modify methods for HDFStore: https://github.com/pydata/pandas/issues/6857 - Integrate multi-index reindexing a bit more: https://github.com/pydata/pandas/issues/7895 - Timedelta support in groupby: #5724 - support numeric index ops: https://github.com/pydata/pandas/issues/8226 - allow index to referenced like a column: https://github.com/pydata/pandas/issues/8162 Collaborative Efforts: - Missing data support in numpy: https://github.com/pydata/pandas/issues/8350 @jorisvandenbossche @cpcloud @TomAugspurger @hayd cc @shoyer cc @immerrr
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2
2014-09-19T20:51:24Z
2014-09-21T17:22:49Z
2014-09-21T17:22:49Z
CONTRIBUTOR
null
cc @amras1 xref #8044 ``` C:\Users\Jeff Reback\Documents\GitHub\pandas>c:\Python26-64\Scripts\nosetests.exe build\lib.win-amd64-2.6\pandas\io\tests\test_parsers.py --pdb --pdb-failure RuntimeError: module compiled against API version 9 but this version of numpy is 7 ..........................................................................................................S............................................................................................. ...> c:\python26-64\lib\unittest.py(325)failUnless() -> if not expr: raise self.failureException, msg (Pdb) u > c:\users\jeff reback\documents\github\pandas\build\lib.win-amd64-2.6\pandas\io\tests\test_parsers.py(3205)test_precise_conversion() -> self.assertTrue(max(precise_errors) < max(normal_errors)) (Pdb) l 3200 return abs(Decimal('{0:.100}'.format(val)) - actual_val) 3201 normal_errors.append(error(normal_val)) 3202 precise_errors.append(error(precise_val)) 3203 self.assertEqual(roundtrip_val, float(text[2:])) # round-trip should match float() 3204 self.assertTrue(sum(precise_errors) < sum(normal_errors)) 3205 -> self.assertTrue(max(precise_errors) < max(normal_errors)) 3206 3207 def test_pass_dtype(self): 3208 data = """\ 3209 one,two 3210 1,2.5 (Pdb) p precise_errors [Decimal('0.0'), Decimal('0E-15'), Decimal('2E-16'), Decimal('0E-16'), Decimal('2E-16'), Decimal('0E-16'), Decimal('0E-16'), Decimal('0E-16'), Decimal('2E-16'), Decimal('0E-16'), Decimal('2E-16'), Dec imal('0E-16'), Decimal('0E-16'), Decimal('0E-16'), Decimal('2E-16'), Decimal('0E-16'), Decimal('2E-16'), Decimal('0E-15'), Decimal('0E-16'), Decimal('0E-16'), Decimal('2E-16'), Decimal('0E-16'), Decim al('2E-16'), Decimal('0E-16'), Decimal('0E-16'), Decimal('0E-16'), Decimal('2E-16'), Decimal('0E-16'), Decimal('2E-16'), Decimal('0E-16'), Decimal('0E-15'), Decimal('0E-16'), Decimal('2E-16'), Decimal ('0E-16'), Decimal('0E-16'), Decimal('0E-16'), Decimal('0E-16'), Decimal('0E-16'), Decimal('2E-16'), Decimal('0E-16'), 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Decimal('0E-16'), Decimal('0E-16'), Decimal('0E-16'), Decimal('2E-16'), Decimal('0E-16'), Decimal('2E-16'), Decimal('0E-15'), Decimal('0E-16'), Decimal('0E-16'), Decimal('0E-16'), Decimal('2E-16'), Decimal('2E-16'), Decimal('2E-16'), Decimal('2E-16'), Decimal('4E-16'), Decimal('3E-16'), Decimal('2E-16'), Decimal('5E-16'), Decimal('2E-16'), Decimal('0.0')] (Pdb) p max(precise_errors) Decimal('5E-16') (Pdb) p max(normal_errors) Decimal('5E-16') (Pdb) ```
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8,325
to_gbq: Allow creation of new tables from DataFrame (and generate schema)
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5
2014-09-19T21:04:05Z
2015-09-13T20:20:52Z
2015-09-13T20:20:52Z
CONTRIBUTOR
null
Small extension on top the `to_gbq` so that you can actually create new tables given only an existing dataframe. Given an arbitrary `DataFrame` with a _non_ hierarchical-index, create a schema from it. For now, we'd likely assume that `object` dtype columns are string and maybe allow for specifying some or all columns for the schema so that int columns with nulls come out correctly (otherwise, they'd be coerced to float columns b/c of nan stuff). E.g.: ``` python In [6]: import pandas as pd In [7]: import pandas.util.testing as testing In [8]: df = testing.makeMixedDataFrame() In [9]: df Out[9]: A B C D 0 0 0 foo1 2009-01-01 1 1 1 foo2 2009-01-02 2 2 0 foo3 2009-01-05 3 3 1 foo4 2009-01-06 4 4 0 foo5 2009-01-07 In [10]: df.dtypes Out[10]: A float64 B float64 C object D datetime64[ns] dtype: object ``` Then you could do something like: ``` python In [11]: generate_bq_schema(df) Out[11]: {'fields': [{'name': 'A', 'type': 'FLOAT'}, {'name': 'B', 'type': 'FLOAT'}, {'name': 'C', 'type': 'STRING'}, {'name': 'D', 'type': 'TIMESTAMP'}]} ``` and with a named index, that could be added to the schema as well. For now, we could stick to requiring non-hierarchical/MultiIndex, but maybe we could use record types for an index that's MultiIndex in the future?
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ENH: Numerically stable Cython functions `roll_cov` and `roll_corr`
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2014-09-19T21:26:31Z
2015-05-09T16:00:41Z
2015-05-09T16:00:41Z
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GBQ: Handle deprecation of oauth2client.tools.run()
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14
2014-09-19T22:09:37Z
2015-05-01T16:45:35Z
2015-05-01T16:45:35Z
CONTRIBUTOR
null
Right now, when you use GbqConnector, you get the following warning: > WARNING:root:This function, oauth2client.tools.run(), and the use of the gflags library are deprecated and will be removed in a future version of the library. I'm not sure how quickly this deprecation will happen or if there are alternatives to keep things the way that they are; but at least worthwhile to have an issue here to address it (in the future). As an aside, I've been glancing at the source for the `bq` client that Google provides as part of Google Cloud SDK and I'm wondering how public the methods are (i.e., if we could adapt some of the code or functions that `bq.py` uses to authenticate and be able to get credentials set up from `gcloud auth login` rather than requiring a separate oauth flow). Not sure though. Again, cc @jacobschaer , I'd be interested in your opinion on whether this is worth investigating at all. I've been finding `read_gbq` and `to_gbq` quite useful - thanks for putting it together!
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BUG: to_clipboard output formatting
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3
2014-09-19T22:39:36Z
2014-09-23T14:40:59Z
2014-09-23T14:40:47Z
CONTRIBUTOR
null
closes https://github.com/pydata/pandas/issues/8305 @jreback I made the simple patch as you suggested for fixing truncated columns, although problem seems to be https://github.com/pydata/pandas/blob/master/pandas/core/format.py#L2118 called from https://github.com/pydata/pandas/blob/master/pandas/core/format.py#L411 Perhaps `conf_max` should respect if caller passes `minimum` argument so it wont truncate? Second issue, where `index=False` was ignored (or just any other argument when `excel=False`) was because arguments were not passed to underlying function `obj.to_string()` and that was easy fix. I added test for checking if column width greater then `max_colwidth` passes clipboard test.
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CLN: start using numpy-1.7 API
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2014-09-20T07:40:02Z
2018-07-13T02:44:29Z
2018-07-13T00:36:14Z
CONTRIBUTOR
null
Now that numpy-1.6 support is dropped we could proceed to use np-1.7 API. This involves fixing a macro or two deep down in pandas internals, but otherwise should be pretty straightforward. As a bonus we can get rid of these annoying build warnings: ``` gcc -pthread -fno-strict-aliasing -g -O2 -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -fPIC -Ipandas/src/klib -Ipandas/src -I/home/immerrr/.conda/envs/pandas/lib/python2.7/site-packages/numpy/core/include -I/home/immerrr/.conda/envs/pandas/include/python2.7 -c pandas/index.c -o build/temp.linux-x86_64-2.7/pandas/index.o In file included from /home/immerrr/.conda/envs/pandas/lib/python2.7/site-packages/numpy/core/include/numpy/ndarraytypes.h:1761:0, from /home/immerrr/.conda/envs/pandas/lib/python2.7/site-packages/numpy/core/include/numpy/ndarrayobject.h:17, from /home/immerrr/.conda/envs/pandas/lib/python2.7/site-packages/numpy/core/include/numpy/arrayobject.h:4, from pandas/index.c:244: /home/immerrr/.conda/envs/pandas/lib/python2.7/site-packages/numpy/core/include/numpy/npy_1_7_deprecated_api.h:15:2: warning: #warning "Using deprecated NumPy API, disable it by " "#defining NPY_NO_DEPRECATED_API NPY_1_7_API_VERSION" [-Wcpp] ``` xref https://github.com/pydata/numexpr/pull/228/files
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ENH: add chunksize argument to read_sql (GH2908)
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3
2014-09-20T15:23:47Z
2014-10-07T00:15:24Z
2014-10-07T00:15:24Z
MEMBER
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Closes #2908 Should probably add this also to `read_sql_table`. And try to reduce some repetitions (`_wrap_result` can maybe be a top-level (in the file) helper function).
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8,331
PERF: add copy=True argument to pd.concat to enable pass-thru concats with complete blocks (GH8252)
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0
2014-09-20T16:00:41Z
2014-09-20T16:50:06Z
2014-09-20T16:50:06Z
CONTRIBUTOR
null
closes #8252
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43,318,578
MDU6SXNzdWU0MzMxODU3OA==
8,332
API: add astype coerce argument / remove raise_on_error
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2
2014-09-20T20:12:05Z
2020-02-11T23:11:38Z
2018-07-06T22:10:45Z
CONTRIBUTOR
null
http://stackoverflow.com/questions/25952790/convert-pandas-series-from-dtype-object-to-float-and-errors-to-nans/25952844#25952844 maybe remove`raise_on_error` and rename to `coerce` (more inline with the rest of pandas API) ``` In [30]: pd.Series([1,2,3,4,'.']).convert_objects(convert_numeric=True) Out[30]: 0 1 1 2 2 3 3 4 4 NaN dtype: float64 ``` I suspect this might make a nice API as well ``` s = pd.Series([1,2,3,4,'.']) s.astype('float64', coerce=True) ``` maybe `coerce=True|None|'raise'` make sense
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to_json() Flat Output
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6
2014-09-20T20:12:18Z
2017-09-18T13:10:38Z
2017-09-18T10:57:28Z
NONE
null
The to_json() I/O command current provides the following output: ``` split dict like {index -> [index], columns -> [columns], data -> [values]} records list like [{column -> value}, ... , {column -> value}] index dict like {index -> {column -> value}} columns dict like {column -> {index -> value}} values just the values array ``` It would be handy if the output could also be provided in the format: ``` mdarray [ [index1,value1a,value1b,...] , [index2,value2a,value2b,...], ... ] ``` This format is, for instance, used by the DyGraphs JS library for plotting data. The following command provides the output I am looking for: ``` np.column_stack((df.index,df.as_matrix())).tolist() ``` (where `df` is a DataFrame)
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43,319,646
MDU6SXNzdWU0MzMxOTY0Ng==
8,334
Drop Rows with Missing Values Between an Array of DataFrames
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3
2014-09-20T21:06:09Z
2014-10-02T12:22:52Z
2014-10-02T12:22:52Z
NONE
null
I've needed this feature 3 or 4 times recently. The way I've typically done it is by making a new dataframe, concatenating the many dataframes after renaming their columns to identify to which dataframe they originally belonged, dropping all NA from the concatenated dataframe, and then splitting up this dataframe and assigning it to the individual dataframes from before. What is a better, less hacky way of doing this? Can it already be done easily with an existing function in Pandas?
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TST: Fixed precision test error for read_csv
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5
2014-09-20T22:06:35Z
2014-09-21T17:24:56Z
2014-09-21T17:23:11Z
CONTRIBUTOR
null
This should hopefully fix #8324. @jreback
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8,336
to_latex with MI column and index names
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3
2014-09-20T22:12:29Z
2017-04-16T08:39:48Z
2017-04-16T08:39:40Z
CONTRIBUTOR
null
I introduced/uncovered a bug here with #8219. If you pass in DataFrame with MI index and col names it doesn't output correctly (and never did). Should be able to fix pretty easily, since it's my fault am assigning myself!
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8,337
ENH: allow axis argument to append / move append code to generic.py (GH8295)
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5
2014-09-21T01:46:08Z
2015-05-09T16:07:26Z
2015-05-09T16:07:26Z
CONTRIBUTOR
null
closes #8295 - [x] Extract `append` method in `frame.py` into `generic.py` - I left the original code just commented. - [x] Extract test cases in `test_frame.py` into `test_generic.py` - [x] Extract test cases in `test_series.py` into `test_generic.py` - [x] Specific test case for testing `axis=1` in `test_generic.py` - [x] Generic method `append` in `generic.py` - [x] `NotImeplementedError` for `Panel` - [ ] Docstring for generic `append` - [ ] Release note - [ ] Documentation - [ ] CI pass One more thing, could `Series.append` use `axis=1` as well ? ``` python pd.Series([1,2,3]).append(pd.Series(['a','b','c']), axis=1) 0 1 0 1 a 1 2 b 2 3 c # just like below # pd.concat((pd.Series([1,2,3]), pd.Series(['a','b','c'])), axis=1) ``` It would be awesome if I could get your guidance to close this issue under the project's convention. Thank you !
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MDU6SXNzdWU0MzMzNjc2NA==
8,338
interpolate() crashes with limit argument
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3
2014-09-21T14:47:59Z
2014-09-21T16:10:43Z
2014-09-21T16:10:43Z
NONE
null
Hi, Pandas' `interpolate()` method crashes if the `limit` parameter is passed and the underlying data frame or series does not contain NaN values, i.e., if there is nothing to interpolate. I think this is a bug. The following code was tested with Pandas 0.14.1 (NumPy 1.9.0): ``` import pandas as pd import numpy as np x = pd.Series(np.arange(4)) x[2] = np.nan # x looks like this: #0 0 #1 1 #2 NaN #3 3 xx = x.interpolate(method='linear', limit=1) # calling interpolate() a second time... xx.interpolate(method='linear', limit=1) --------------------------------------------------------------------------- IndexError Traceback (most recent call last) [...] /.../python2.7/site-packages/pandas/core/common.pyc in _interp_limit(invalid, limit) 1437 violate = [invalid[x:x + limit + 1] for x in all_nans] 1438 violate = np.array([x.all() & (x.size > limit) for x in violate]) -> 1439 return all_nans[violate] + limit 1440 1441 xvalues = getattr(xvalues, 'values', xvalues) IndexError: arrays used as indices must be of integer (or boolean) type ``` It seems that – since `all_nans` is empty – the dtype of `violate` is set to float (NumPy default). And float arrays cannot be used for indexing. It's probably safe to replace line `1438` with the following: ``` violate = np.array([x.all() & (x.size > limit) for x in violate], dtype=np.int) ```
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43,337,863
MDU6SXNzdWU0MzMzNzg2Mw==
8,339
Multithreaded access to Series multiply (or division) operator causes segmentation fault
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5
2014-09-21T15:40:14Z
2014-09-21T20:43:59Z
2014-09-21T16:09:55Z
NONE
null
I have run across some really weird situation where I get segmentation fault only when multiple threads access the same code simultaneously (problems with re-entrancy?). Also this only occurs with certain datasets and I couldn't reproduce it with toydata. The data.p file required can be downloaded from here: https://copy.com/WMQ6UP1tHjdE This is the sample code: ``` import pickle import concurrent.futures import pandas as pd import numpy as np data = pickle.load(open('data.p', 'rb')) # cannot reproduce the bug with toy data! # data_l = pd.Series(np.random.randn(100)) # data_l.index = pd.tseries.index.DatetimeIndex(start='1901-01-01', periods=100, freq='D') # data_r = pd.Series(np.random.randn(1000)) # data_r.index = pd.tseries.index.DatetimeIndex(start='1900-01-01', periods=1000, freq='D') # data_r['1900-01-01':'1900-06-30'] = np.nan def myfun(): return data[0]['AdjClose(GBP)'] * data[1] # return data_l * data_r # if using only one thread (ThreadPoolExecutor(1)) everything works... with concurrent.futures.ThreadPoolExecutor(25) as executor: futures = [] for _ in range(100000): futures.append(executor.submit(myfun)) for fut in concurrent.futures.as_completed(futures): if fut.exception(): print(fut.exception()) else: print("Success!") ```
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CLN: pep8 clean up of sql.py
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2014-09-21T15:59:08Z
2014-09-21T23:29:18Z
2014-09-21T17:25:41Z
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8,341
BUG: to_sql fails with datetime.time values with sqlite fallback mode
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8
2014-09-21T19:14:23Z
2016-02-24T12:55:26Z
2016-02-24T12:55:26Z
MEMBER
null
Columns of `datetime.time` were not yet supported in sqlite fallback mode (as noted in #7567, and do work for sqlalchemy), but it now seems to fail silently with master (instead of raising an error). Using: ``` import sqlite3 con = sqlite3.connect(':memory:') dt = pd.date_range('2014-01-01', periods=10, freq='10h') df = pd.DataFrame({'date':dt.date, 'time':dt.time}) df.to_sql('test_datetime', con, index=False, if_exists='replace') ``` gives: ``` In [37]: pd.read_sql_query('select * from test_datetime', con) Out[37]: Empty DataFrame Columns: [date, time] Index: [] ```
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API: integrate with openpyxl 2.0-2.1 changes
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31
2014-09-21T19:33:47Z
2015-09-21T15:35:47Z
2015-09-21T15:35:47Z
CONTRIBUTOR
null
Builds are failing on Travis due to some issue with Excel (weirdly passed on merge but then started failing a few commits later). Currently investigating. C.f. https://travis-ci.org/pydata/pandas/jobs/35873580 @neirbowj - any idea why these tests stopped passing? It's all some variation on the following: ``` ====================================================================== ERROR: test_tsframe (pandas.io.tests.test_excel.OpenpyxlTests_NoMerge) ---------------------------------------------------------------------- Traceback (most recent call last): File "/home/travis/virtualenv/python3.4.1/lib/python3.4/site-packages/pandas/io/tests/test_excel.py", line 562, in test_tsframe df.to_excel(path, 'test1') File "/home/travis/virtualenv/python3.4.1/lib/python3.4/site-packages/pandas/util/decorators.py", line 88, in wrapper return func(*args, **kwargs) File "/home/travis/virtualenv/python3.4.1/lib/python3.4/site-packages/pandas/core/frame.py", line 1228, in to_excel startrow=startrow, startcol=startcol) File "/home/travis/virtualenv/python3.4.1/lib/python3.4/site-packages/pandas/io/excel.py", line 687, in write_cells 'number_format':{'format_code': self.datetime_format}})) File "/home/travis/virtualenv/python3.4.1/lib/python3.4/site-packages/pandas/io/excel.py", line 757, in _convert_to_style_kwargs new_v = _conv_to_x(v) File "/home/travis/virtualenv/python3.4.1/lib/python3.4/site-packages/pandas/io/excel.py", line 1043, in _convert_to_number_format from openpyxl.styles import NumberFormat ImportError: cannot import name 'NumberFormat' ---------------------------------------------------------------------- ```
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API/ENH/COMPAT: compat for datetime.time via Timedelta
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3
2014-09-21T19:41:06Z
2018-07-06T22:08:27Z
2018-07-06T22:08:15Z
CONTRIBUTOR
null
Now that `Timedelta` is a full fledged type. It is quite trivial to convert a `datetime.time` to a `Timedelta`. pros: - highly performant - very similar output - no need to create a `TimeBlock` cons: - no longer a `datetime.time` instance (instead its a sub-class of `datetime.timedelta`) - doesn't support `tz`(anyone actually use this 'feature')? - negative times would be allowed (eg. I think this is not allowed for `datetime.time`). So either we go full-fledged and create a `Time` scalar and `TimeBlock` (though `TimeIndex` could work w/o these.). Its possible to also create a `TimeBlock` and NOT create a `Time` scalar. That said creating a `Time` scalar is very easy and much simpler than `Timedelta` and shares a lot of code. ``` In [28]: s = Series([datetime.time(12,0,0),datetime.time(14,1,2),datetime.time(2,0,1)]) In [29]: s Out[29]: 0 12:00:00 1 14:01:02 2 02:00:01 dtype: object In [30]: pd.lib.infer_dtype(s) Out [30]: 'time' In [31]: s.iloc[0] Out[31]: datetime.time(12, 0) In [32]: s.apply(lambda x: pd.Timedelta(seconds=x.hour*3600+x.minute*60+x.second,microseconds=x.microsecond)) Out[32]: 0 12:00:00 1 14:01:02 2 02:00:01 dtype: timedelta64[ns] In [32]: s.apply(lambda x: pd.Timedelta(seconds=x.hour*3600+x.minute*60+x.second,microseconds=x.microsecond)).iloc[0] Out[32]: Timedelta('0 days 12:00:00') ``` thoughts? Is `datetime.time` really THAT different from `datetime.timedelta` that it SHOULD be a full-fledged type?
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Panel.clip() doesn't accept (even) scalar values
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2
2014-09-21T20:35:22Z
2018-07-06T20:21:05Z
2017-07-11T09:56:32Z
CONTRIBUTOR
null
Let's take the following example: ``` python d = {'Item1' : pandas.DataFrame(numpy.random.randn(4, 3)), 'Item2' : pandas.DataFrame(numpy.random.randn(4, 2))} p = pandas.Panel(d) p.clip(0,1) ``` If I run the script with pandas 0.14.1 on both python 2.7.8 and 3.4.1 I'm getting the following error: ``` Traceback (most recent call last): File "Untitled.py", line 11, in <module> p.clip(0,1) File "/usr/local/lib/python2.7/site-packages/pandas/core/generic.py", line 2684, in clip result = result.clip_lower(lower) File "/usr/local/lib/python2.7/site-packages/pandas/core/generic.py", line 2722, in clip_lower return self.where((self >= threshold) | isnull(self), threshold) File "/usr/local/lib/python2.7/site-packages/pandas/core/ops.py", line 934, in f self._constructor.__name__) ValueError: Simple arithmetic with Panel can only be done with scalar values ``` Digging a little bit deeper showed that the following line (the | operator to be precise) raises the error: https://github.com/pydata/pandas/blob/1d65bc89d64c71f8d36f3ca92dd57db2efad7fdb/pandas/core/generic.py#L2796
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MDExOlB1bGxSZXF1ZXN0MjE1NTM0Mjc=
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ENH/BUG: allow timedelta resamples
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0
2014-09-21T22:28:34Z
2014-09-22T19:34:15Z
2014-09-22T19:29:24Z
CONTRIBUTOR
null
- [x] docs ``` In [4]: pd.set_option('max_rows',10) In [5]: df = DataFrame({'A' : np.arange(1480)},index=pd.to_timedelta(np.arange(1480),unit='T')) In [6]: df Out[6]: A 0 days 00:00:00 0 0 days 00:01:00 1 0 days 00:02:00 2 0 days 00:03:00 3 0 days 00:04:00 4 ... ... 1 days 00:35:00 1475 1 days 00:36:00 1476 1 days 00:37:00 1477 1 days 00:38:00 1478 1 days 00:39:00 1479 [1480 rows x 1 columns] In [7]: df.resample('30T',how='sum') Out[7]: A 0 days 00:00:00 435 0 days 00:30:00 1335 0 days 01:00:00 2235 0 days 01:30:00 3135 0 days 02:00:00 4035 ... ... 0 days 22:30:00 40935 0 days 23:00:00 41835 0 days 23:30:00 42735 1 days 00:00:00 43635 1 days 00:30:00 14745 [50 rows x 1 columns] ```
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8,346
RLS: 0.15.0 release schedule
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28
2014-09-21T22:46:47Z
2014-10-21T11:42:23Z
2014-10-19T21:39:41Z
CONTRIBUTOR
null
Going to push the schedule at least a week (from end of sept). Let's try for end of 1st week of oct for RC, and end of 2nd week for final.
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DOC: Specialities wiki
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2
2014-09-21T23:17:17Z
2014-10-01T09:27:36Z
2014-09-23T14:32:45Z
CONTRIBUTOR
null
I created this wiki page: https://github.com/pydata/pandas/wiki/Specialities feel free to add/update/change if you think you should (or not) be tagged in a particular category. This is really for the core-devs reference as to know whom to cc when an issue comes up.
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BUG: _Openpyxl2Writer mishandles merged cell style
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5
2014-09-22T01:45:34Z
2014-10-15T17:55:49Z
2014-10-15T17:55:49Z
CONTRIBUTOR
null
Thanks to @jtratner for catching this.
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MDU6SXNzdWU0MzQyMTU2MA==
8,349
Bug on pivot_table with margins and dict aggfunc
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8
2014-09-22T07:01:38Z
2014-09-30T16:05:42Z
2014-09-30T16:05:42Z
CONTRIBUTOR
null
I think there is a bug on pandas 0.14.1 pivot_table using dictionary aggfunc and margins. Test code: <code>df=pandas.DataFrame([ {'JOB':'Worker','NAME':'Bob' ,'YEAR':2013,'MONTH':12,'DAYS': 3,'SALARY': 17}, {'JOB':'Employ','NAME':'Mary','YEAR':2013,'MONTH':12,'DAYS': 5,'SALARY': 23}, {'JOB':'Worker','NAME':'Bob' ,'YEAR':2014,'MONTH': 1,'DAYS':10,'SALARY':100}, {'JOB':'Worker','NAME':'Bob' ,'YEAR':2014,'MONTH': 1,'DAYS':11,'SALARY':110}, {'JOB':'Employ','NAME':'Mary','YEAR':2014,'MONTH': 1,'DAYS':15,'SALARY':200}, {'JOB':'Worker','NAME':'Bob' ,'YEAR':2014,'MONTH': 2,'DAYS': 8,'SALARY': 80}, {'JOB':'Employ','NAME':'Mary','YEAR':2014,'MONTH': 2,'DAYS': 5,'SALARY':190} ])</code> <code>df=df.set_index(['JOB','NAME','YEAR','MONTH'],drop=False,append=False)</code> <code>df=df.pivot_table(index=['JOB','NAME'],columns=['YEAR','MONTH'],values=['DAYS','SALARY'],aggfunc={'DAYS':'mean','SALARY':'sum'})</code> All works fine but raise error using margins: <code>df=df.pivot_table(index=['JOB','NAME'],columns=['YEAR','MONTH'],values=['DAYS','SALARY'],aggfunc={'DAYS':'mean','SALARY':'sum'},margins=True) df=df.pivot_table(index=['JOB','NAME'],columns=['YEAR','MONTH'],values=['DAYS','SALARY'],aggfunc={'DAYS':'mean','SALARY':'sum'},margins=True) File "/usr/local/lib/python2.7/site-packages/pandas-0.14.1-py2.7-linux-x86_64.egg/pandas/util/decorators.py", line 60, in wrapper return func(_args, *_kwargs) File "/usr/local/lib/python2.7/site-packages/pandas-0.14.1-py2.7-linux-x86_64.egg/pandas/util/decorators.py", line 60, in wrapper return func(_args, *_kwargs) File "/usr/local/lib/python2.7/site-packages/pandas-0.14.1-py2.7-linux-x86_64.egg/pandas/tools/pivot.py", line 147, in pivot_table cols=columns, aggfunc=aggfunc) File "/usr/local/lib/python2.7/site-packages/pandas-0.14.1-py2.7-linux-x86_64.egg/pandas/tools/pivot.py", line 191, in _add_margins row_margin[k] = grand_margin[k[0]] KeyError: 'SALARY' </code>
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8,350
Why does pandas work around numpy limitations with custom dtypes instead of fixing them upstream?
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17
2014-09-22T07:26:30Z
2015-10-20T22:42:35Z
2015-10-20T22:42:35Z
MEMBER
null
I was thinking particularly of cases like `datetime64`, `Categorical` and `GeoSeries` (from geopandas). I recently posted on the numpy discussion mailing to try to get a sense of what solutions exist for writing custom dtypes without writing C. Unfortunately, it appears there's not much hope! http://mail.scipy.org/pipermail/numpy-discussion/2014-September/071231.html @njsmith suggested that I really should ask pandas developers to chime in to find out why they choose to work around numpy's limitations rather than enhance it. I would love it if someone who understands the "why" for the choices pandas made could add their perspective to that thread. @jreback @JanSchulz any thoughts to add? or did a sum it up well enough with "nobody wants to write C"?
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8,351
DOC: move Trellis plotting under Plotting
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7
2014-09-22T13:14:35Z
2014-09-29T13:06:34Z
2014-09-22T21:46:12Z
CONTRIBUTOR
null
As this is not really a fleshed out section, kind of odd to have it as a top-level @TomAugspurger @jorisvandenbossche
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BUG: Work-around openpyxl-2.1.0 NumberFormat removal
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4
2014-09-22T14:43:41Z
2014-09-23T12:54:55Z
2014-09-22T15:55:24Z
CONTRIBUTOR
null
See #8342. This patch should allow all tests to pass with any supported openpyxl v1, and with openpyxl 2.1.0. Consider this an interim measure, not a complete fix.
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2014-09-22T14:57:08Z
2017-05-15T21:16:01Z
2014-09-22T21:46:12Z
CONTRIBUTOR
null
Closes https://github.com/pydata/pandas/issues/8351 Just moved it and changed a few heading levels. I could add a note about considering seaborn. I've never used rplot.
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Bug on pivot_table with margins and dict aggfunc
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9
2014-09-22T15:19:37Z
2014-09-30T16:05:42Z
2014-09-30T16:05:15Z
CONTRIBUTOR
null
closes #8349 bug on pandas 0.14.1 pivot_table using dictionary aggfunc and margins. Test code: <pre> <code> df=pandas.DataFrame([ {'JOB':'Worker','NAME':'Bob' ,'YEAR':2013,'MONTH':12,'DAYS': 3,'SALARY': 17}, {'JOB':'Employ','NAME':'Mary','YEAR':2013,'MONTH':12,'DAYS': 5,'SALARY': 23}, {'JOB':'Worker','NAME':'Bob' ,'YEAR':2014,'MONTH': 1,'DAYS':10,'SALARY':100}, {'JOB':'Worker','NAME':'Bob' ,'YEAR':2014,'MONTH': 1,'DAYS':11,'SALARY':110}, {'JOB':'Employ','NAME':'Mary','YEAR':2014,'MONTH': 1,'DAYS':15,'SALARY':200}, {'JOB':'Worker','NAME':'Bob' ,'YEAR':2014,'MONTH': 2,'DAYS': 8,'SALARY': 80}, {'JOB':'Employ','NAME':'Mary','YEAR':2014,'MONTH': 2,'DAYS': 5,'SALARY':190} ]) df=df.set_index(['JOB','NAME','YEAR','MONTH'],drop=False,append=False) df=df.pivot_table(index=['JOB','NAME'], columns=['YEAR','MONTH'], values=['DAYS','SALARY'], aggfunc={'DAYS':'mean','SALARY':'sum'}) </code> </pre> All works fine but raise error using margins: <pre> <code> df=df.pivot_table(index=['JOB','NAME'], columns=['YEAR','MONTH'], values=['DAYS','SALARY'], aggfunc={'DAYS':'mean','SALARY':'sum'}, margins=True) </code> </pre> df=df.pivot_table(index=['JOB','NAME'],columns=['YEAR','MONTH'],values=['DAYS','SALARY'],aggfunc={'DAYS':'mean','SALARY':'sum'},margins=True) File "/usr/local/lib/python2.7/site-packages/pandas-0.14.1-py2.7-linux-x86_64.egg/pandas/util/decorators.py", line 60, in wrapper return func(_args, *_kwargs) File "/usr/local/lib/python2.7/site-packages/pandas-0.14.1-py2.7-linux-x86_64.egg/pandas/util/decorators.py", line 60, in wrapper return func(_args, *_kwargs) File "/usr/local/lib/python2.7/site-packages/pandas-0.14.1-py2.7-linux-x86_64.egg/pandas/tools/pivot.py", line 147, in pivot_table cols=columns, aggfunc=aggfunc) File "/usr/local/lib/python2.7/site-packages/pandas-0.14.1-py2.7-linux-x86_64.egg/pandas/tools/pivot.py", line 191, in _add_margins row_margin[k] = grand_margin[k[0]] KeyError: 'SALARY'
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Test margins with dictionary aggfunc
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2014-09-22T15:33:12Z
2014-09-23T12:26:37Z
2014-09-23T07:50:42Z
CONTRIBUTOR
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BUG: Work-around openpyxl-2.1.0 NumberFormat removal
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0
2014-09-22T15:54:57Z
2014-09-22T16:39:26Z
2014-09-22T16:39:26Z
CONTRIBUTOR
null
xref #8342 compat for openpyxl: 2.0.0 thru 2.1.0, but a bit hacky
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Changed round_trip converter to Python converter instead of strtod
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2014-09-22T16:08:17Z
2014-09-28T16:24:39Z
2014-09-27T01:48:08Z
CONTRIBUTOR
null
As @mdickinson noted in #8044.
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API/BUG: Indexing a DatetimeIndex by Period
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CONTRIBUTOR
null
Curiously one can index a DatetimeIndex by the string representation of a Period, but not by an actual Period object. Is this intentional? ``` Python 3.4.1 (v3.4.1:c0e311e010fc, May 18 2014, 10:45:13) [MSC v.1600 64 bit (AMD64)] Type "copyright", "credits" or "license" for more information. IPython 2.2.0 -- An enhanced Interactive Python. ? -> Introduction and overview of IPython's features. %quickref -> Quick reference. help -> Python's own help system. object? -> Details about 'object', use 'object??' for extra details. In [1]: from pandas import Series, date_range, Period In [2]: s = Series(range(365), index=date_range('2001-01-01', periods=365)) In [3]: s[str(Period('2001-03', 'M'))] Out[3]: 2001-03-01 59 2001-03-02 60 2001-03-03 61 2001-03-04 62 2001-03-05 63 2001-03-06 64 2001-03-07 65 2001-03-08 66 2001-03-09 67 2001-03-10 68 2001-03-11 69 2001-03-12 70 2001-03-13 71 2001-03-14 72 2001-03-15 73 2001-03-16 74 2001-03-17 75 2001-03-18 76 2001-03-19 77 2001-03-20 78 2001-03-21 79 2001-03-22 80 2001-03-23 81 2001-03-24 82 2001-03-25 83 2001-03-26 84 2001-03-27 85 2001-03-28 86 2001-03-29 87 2001-03-30 88 2001-03-31 89 Freq: D, dtype: int32 In [4]: s[Period('2001-03', 'M')] --------------------------------------------------------------------------- KeyError Traceback (most recent call last) <ipython-input-4-64d0668f17a9> in <module>() ----> 1 s[Period('2001-03', 'M')] C:\Python34\lib\site-packages\pandas\core\series.py in __getitem__(self, key) 482 def __getitem__(self, key): 483 try: --> 484 result = self.index.get_value(self, key) 485 486 if not np.isscalar(result): C:\Python34\lib\site-packages\pandas\tseries\index.py in get_value(self, series, key) 1256 return self.get_value_maybe_box(series, key) 1257 except (TypeError, ValueError, KeyError): -> 1258 raise KeyError(key) 1259 1260 def get_value_maybe_box(self, series, key): KeyError: Period('2001-03', 'M') ```
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MDU6SXNzdWU0MzUyOTkwMw==
8,359
COMPAT/CLN: remove need for core/array.py
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0
2014-09-22T18:25:17Z
2014-09-29T13:21:50Z
2014-09-29T13:21:50Z
CONTRIBUTOR
null
https://github.com/pydata/pandas/blob/master/pandas/core/array.py not necessary and clutters the code ATM.
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43,535,811
MDExOlB1bGxSZXF1ZXN0MjE2MDExMDU=
8,360
BUG: OLS with clustering and nw_lags does not error
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5
2014-09-22T19:03:23Z
2014-09-23T14:38:37Z
2014-09-23T14:24:16Z
CONTRIBUTOR
null
Added statement to raise ValueError when OLS is run with clustering and Newey-West adjustments. Closes #5884. This is a re-attempt at GH8170.
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8,361
Use airspeed velocity for benchmarking
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1
2014-09-22T20:54:05Z
2016-07-25T09:43:06Z
2015-08-19T00:32:16Z
MEMBER
null
Since `vbench` was (at least in part) an inspiration for [Airspeed Velocity](https://github.com/spacetelescope/asv/) (`asv`), I think getting something like this set up for `pandas` would be useful and extremely helpful for us and for `asv`. We have a _ton_ of `vbench` code and we'd probably be a great project for pushing the boundaries of and finding edge cases in `asv`. This would also be a great for someone to get to know the scale of datasets for which pandas was designed. Here's a nice demo of `astropy` using `asv`: http://mdboom.github.io/astropy-benchmark
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8,362
Index.intersection bug?
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6
2014-09-22T21:40:52Z
2014-09-29T14:28:06Z
2014-09-29T14:28:06Z
CONTRIBUTOR
null
I ran into an odd behaviour when taking the intersection of two Indexes. Specifically, ``` python left = pd.Index(['A','B','A','C']) right = pd.Index(['B','D']) left.intersection(right) ``` returns ``` python Index(['B', 'C'], dtype='object') ``` However, I would expect this to return ``` python Index(['B'], dtype='object') ``` If `Index(['B', 'C'], dtype='object')` is the intended behaviour, can someone explain the rationale behind it?
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BUG: datetime ops with non-unique indexes is buggy
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1
2014-09-22T21:56:11Z
2014-09-23T01:05:32Z
2014-09-23T01:05:32Z
CONTRIBUTOR
null
from [SO](http://stackoverflow.com/questions/25963622/column-operations-with-pandas-dataframe-objects-with-non-unique-indices/25964177?noredirect=1#comment40684868_25964177) ``` In [3]: df = DataFrame({'A' : np.arange(5), 'B' : np.arange(1,6)},index=[2,2,3,3,4]) In [4]: df.B-df.A Out[4]: 2 1 2 1 3 1 3 1 4 1 dtype: int64 In [5]: df = DataFrame({'A' : date_range('20130101',periods=5), 'B' : date_range('20130101 09:00:00', periods=5)},index=[2,2,3,3,4]) In [6]: df.B-df.A Out[6]: 2 0 days 09:00:00 2 -1 days +09:00:00 2 1 days 09:00:00 2 0 days 09:00:00 3 0 days 09:00:00 3 -1 days +09:00:00 3 1 days 09:00:00 3 0 days 09:00:00 4 0 days 09:00:00 dtype: timedelta64[ns] ```
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8,364
BUG: Bug in alignment with TimeOps and non-unique indexes (GH8363)
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0
2014-09-22T22:07:36Z
2014-09-23T01:05:32Z
2014-09-23T01:05:32Z
CONTRIBUTOR
null
closes #8363
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8,365
Series/DataFrame.rank() doesn't handle certain floats properly
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2
2014-09-22T23:15:24Z
2015-03-03T01:15:35Z
2015-03-03T01:15:35Z
NONE
null
There appears to be an issue with floats that are close together in series.rank(), pandas version 0.14. For reference this test worked in pandas 0.12.0. ### Current Behavior ``` >>> series = pd.Series([1000.000669 , 1000.000041 , 1000.000059 , 1000.000063 , 1000.000121 , 1000.000104 , 1000.000040 , 1000.000062 , 1000.000095 , 1000.000091 , 1000.000050 , 1000.000074 , 1000.000063 , 1000.000076 , 1000.000083 , 1000.000061 , 1000.000030 , 1000.000069 , 1000.000090 , 1000.000116 , 1000.000058 , 1000.000074 , 1000.000035 , 1000.000084 , 1000.000067 , 1000.000072 , 1000.000105 , 1000.000091 , 1000.000077 , 1000.000040 , 1000.000108 , 1000.000117 , 1000.000114 , 1000.000117 , 1000.000099 , 1000.000039 , 1000.000046 , 1000.000105 , 1000.000057]) >>> series.rank() 0 39.0 1 19.5 2 19.5 3 19.5 4 19.5 5 19.5 6 19.5 7 19.5 8 19.5 9 19.5 10 19.5 11 19.5 12 19.5 13 19.5 14 19.5 15 19.5 16 19.5 17 19.5 18 19.5 19 19.5 20 19.5 21 19.5 22 19.5 23 19.5 24 19.5 25 19.5 26 19.5 27 19.5 28 19.5 29 19.5 30 19.5 31 19.5 32 19.5 33 19.5 34 19.5 35 19.5 36 19.5 37 19.5 38 19.5 dtype: float64 ``` ### Expected Behavior ``` >>> from scipy import stats >>> stats.rankdata(series) array([ 39. , 6. , 11. , 14.5, 38. , 30. , 4.5, 13. , 28. , 26.5, 8. , 19.5, 14.5, 21. , 23. , 12. , 1. , 17. , 25. , 35. , 10. , 19.5, 2. , 24. , 16. , 18. , 31.5, 26.5, 22. , 4.5, 33. , 36.5, 34. , 36.5, 29. , 3. , 7. , 31.5, 9. ]) ``` ### System Information ``` >>> pd.show_versions() INSTALLED VERSIONS ------------------ commit: None python: 2.7.6.final.0 python-bits: 64 OS: Darwin OS-release: 13.3.0 machine: x86_64 processor: i386 byteorder: little LC_ALL: None LANG: en_US.UTF-8 pandas: 0.14.1 nose: 1.3.4 Cython: 0.21 numpy: 1.8.1 scipy: 0.14.0 statsmodels: 0.5.0 IPython: None sphinx: None patsy: 0.3.0 scikits.timeseries: None dateutil: 2.2 pytz: 2014.7 bottleneck: 0.8.0 tables: 3.0.0 numexpr: 2.4 matplotlib: None openpyxl: 2.1.0 xlrd: 0.9.3 xlwt: 0.7.5 xlsxwriter: None lxml: None bs4: None html5lib: None httplib2: None apiclient: None rpy2: None sqlalchemy: 0.8.0 pymysql: None psycopg2: 2.5.4 (dt dec pq3 ext) ```
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8,366
DataFrame.dropna bug fix
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3
2014-09-23T01:44:39Z
2014-09-25T00:38:15Z
2014-09-25T00:05:35Z
CONTRIBUTOR
null
Bug fix for #8303. Now raise KeyError if any non-existent columns are passed in the subset argument.
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8,367
Timezone info is lost when pickling datetime indices
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8
2014-09-23T07:23:20Z
2014-09-23T15:12:58Z
2014-09-23T14:58:45Z
NONE
null
``` python >>> c.head(3) end_time location_id sensor_id view_id start_time 54 1000305 0 2014-07-21 07:00:00+00:00 2014-07-21 07:15:00+00:00 2014-07-21 07:15:00+00:00 2014-07-21 07:30:00+00:00 2014-07-21 07:30:00+00:00 2014-07-21 07:45:00+00:00 >>> c.to_pickle(r"C:\temp\fff") >>> pd.read_pickle(r"C:\temp\fff").head(3) end_time location_id sensor_id view_id start_time 54 1000305 0 2014-07-21 07:00:00 2014-07-21 07:15:00+00:00 2014-07-21 07:15:00 2014-07-21 07:30:00+00:00 2014-07-21 07:30:00 2014-07-21 07:45:00+00:00 ``` Please note that the timezone is lost from `start_time`.
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8,368
DatetimeIndex.to_series loses timezone information
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2014-09-23T07:56:45Z
2014-09-23T11:39:58Z
2014-09-23T11:39:50Z
NONE
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``` python >> f <class 'pandas.tseries.index.DatetimeIndex'> [2014-07-25 07:00:37+00:00, ..., 2014-07-26 07:50:17+00:00] Length: 53304, Freq: None, Timezone: UTC >> f.to_series() datetime 2014-07-25 07:00:37+00:00 2014-07-25 07:00:37 2014-07-25 07:11:36+00:00 2014-07-25 07:11:36 2014-07-25 08:01:48+00:00 2014-07-25 08:01:48 2014-07-23 07:00:31+00:00 2014-07-23 07:00:31 2014-07-23 07:00:40+00:00 2014-07-23 07:00:40 2014-07-23 17:27:36+00:00 2014-07-23 17:27:36 2014-07-23 17:33:00+00:00 2014-07-23 17:33:00 2014-07-23 19:44:10+00:00 2014-07-23 19:44:10 2014-07-23 20:10:50+00:00 2014-07-23 20:10:50 2014-07-21 07:10:18+00:00 2014-07-21 07:10:18 2014-07-21 07:49:06+00:00 2014-07-21 07:49:06 2014-07-21 21:54:48+00:00 2014-07-21 21:54:48 2014-07-25 07:00:23+00:00 2014-07-25 07:00:23 2014-07-25 07:00:23+00:00 2014-07-25 07:00:23 2014-07-25 08:06:16+00:00 2014-07-25 08:06:16 ... 2014-07-27 19:49:12+00:00 2014-07-27 19:49:12 2014-07-27 19:49:28+00:00 2014-07-27 19:49:28 2014-07-27 19:50:10+00:00 2014-07-27 19:50:10 2014-07-27 19:51:51+00:00 2014-07-27 19:51:51 2014-07-27 19:51:52+00:00 2014-07-27 19:51:52 2014-07-27 19:52:52+00:00 2014-07-27 19:52:52 2014-07-26 12:52:46+00:00 2014-07-26 12:52:46 2014-07-26 12:52:46+00:00 2014-07-26 12:52:46 2014-07-26 12:52:46+00:00 2014-07-26 12:52:46 2014-07-23 16:04:22+00:00 2014-07-23 16:04:22 2014-07-23 16:04:22+00:00 2014-07-23 16:04:22 2014-07-23 16:04:22+00:00 2014-07-23 16:04:22 2014-07-26 07:50:07+00:00 2014-07-26 07:50:07 2014-07-26 07:50:16+00:00 2014-07-26 07:50:16 2014-07-26 07:50:17+00:00 2014-07-26 07:50:17 Name: datetime, Length: 53304 >> pd.show_versions() INSTALLED VERSIONS ------------------ commit: None python: 2.7.7.final.0 python-bits: 64 OS: Windows OS-release: 8 machine: AMD64 processor: Intel64 Family 6 Model 42 Stepping 7, GenuineIntel byteorder: little LC_ALL: None LANG: None pandas: 0.14.0 nose: 1.3.3 Cython: 0.20.1 numpy: 1.8.1 scipy: 0.14.0 statsmodels: 0.5.0 IPython: 2.1.0 sphinx: 1.2.2 patsy: 0.2.1 scikits.timeseries: None dateutil: 1.5 pytz: 2014.3 bottleneck: None tables: 3.1.1 numexpr: 2.3.1 matplotlib: 1.3.1 openpyxl: 1.8.5 xlrd: 0.9.3 xlwt: 0.7.5 xlsxwriter: 0.5.5 lxml: 3.3.5 bs4: 4.3.1 html5lib: None bq: None apiclient: None rpy2: None sqlalchemy: 0.9.4 pymysql: None psycopg2: None ```
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8,369
DataFrame.set_value() raise Exception
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2014-09-23T08:46:11Z
2014-09-23T11:37:18Z
2014-09-23T11:37:08Z
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In [97]:df=pd.DataFrame({'x':['A','B','C'],'y':['0','0','0']}) ``` x y ``` 0 A 0 1 B 0 2 C 0 In [99]:df.set_value(index=df.x.str.startswith('A'),col='y',value='1') --- TypeError Traceback (most recent call last) <ipython-input-99-08195440f2b8> in <module>() ----> 1 df.set_value(index=df.x.str.startswith('A'),col='y',value='1') D:\winpython\WinPython-32bit-2.7.6.4\python-2.7.6\lib\site-packages\pandas\core\frame.pyc in set_value(self, index, col, value, takeable) 1572 series = self._get_item_cache(col) 1573 engine = self.index._engine -> 1574 engine.set_value(series.values, index, value) 1575 return self 1576 except KeyError: D:\winpython\WinPython-32bit-2.7.6.4\python-2.7.6\lib\site-packages\pandas\index.pyd in pandas.index.IndexEngine.set_value (pandas\index.c:3231)() D:\winpython\WinPython-32bit-2.7.6.4\python-2.7.6\lib\site-packages\pandas\index.pyd in pandas.index.IndexEngine.set_value (pandas\index.c:3064)() D:\winpython\WinPython-32bit-2.7.6.4\python-2.7.6\lib\site-packages\pandas\index.pyd in pandas.index.IndexEngine.get_loc (pandas\index.c:3324)() TypeError: In [100]:df.set_value(index=df.x.str.startswith('A'),col='z',value='1') ``` x y z ``` 0 A 0 1 1 B 0 NaN 2 C 0 NaN why the parameter 'col' must set as a new column will be ok? ## INSTALLED VERSIONS commit: None python: 2.7.6.final.0 python-bits: 32 OS: Windows OS-release: 7 machine: AMD64 processor: Intel64 Family 6 Model 42 Stepping 7, GenuineIntel byteorder: little LC_ALL: None LANG: None pandas: 0.14.0 nose: 1.3.1 Cython: 0.20.1 numpy: 1.8.1 scipy: 0.13.3 statsmodels: 0.5.0 IPython: 2.0.0 sphinx: 1.2.2 patsy: 0.2.1 scikits.timeseries: None dateutil: 2.2 pytz: 2013.9 bottleneck: None tables: 3.1.1 numexpr: 2.3.1 matplotlib: 1.3.1 openpyxl: 1.6.1 xlrd: 0.9.3 xlwt: 0.7.5 xlsxwriter: None lxml: 3.3.5 bs4: 4.3.2 html5lib: None bq: None apiclient: None rpy2: None sqlalchemy: 0.9.4 pymysql: None psycopg2: None
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8,370
BUG/COMPAT: set tz on DatetimeIndex on pickle reconstruction (GH8367)
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0
2014-09-23T14:17:10Z
2014-09-23T14:58:45Z
2014-09-23T14:58:45Z
CONTRIBUTOR
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closes #8367
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8,371
Resample method doesn't round timestamps with prime numbers frequency
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1
2014-09-23T16:22:27Z
2014-09-26T15:57:37Z
2014-09-26T15:57:37Z
NONE
null
Hi, I've found this issue when I tried to resample at different frequencies. When the frequency is a prime number, the first timestamp is not rounded and it takes the first timestamp in the file. Do I need an extra parameter to round timestamps? ``` python csv = r"""Date,Time,Ask,Bid,AskVolume,BidVolume 11-08-2014,00:00:01.093,1.34046,1.34042,1.25,1.69 11-08-2014,00:00:02.159,1.34047,1.34043,4.69,1 11-08-2014,00:00:02.667,1.34046,1.34042,1.32,2.44 11-08-2014,00:00:03.175,1.34046,1.34043,1.32,1 11-08-2014,00:00:07.058,1.34046,1.34043,3.75,1.69 11-08-2014,00:00:07.362,1.34043,1.34041,2.25,1 11-08-2014,00:00:08.324,1.34043,1.34042,1.5,1 11-08-2014,00:00:08.830,1.34045,1.34043,2.44,1 11-08-2014,00:00:08.982,1.34043,1.34041,3,1.69 11-08-2014,00:00:09.815,1.34042,1.34041,1,1 11-08-2014,00:00:10.540,1.34043,1.34041,2.63,1 11-08-2014,00:00:11.061,1.34043,1.3404,7.99,2.25 11-08-2014,00:00:11.617,1.34042,1.34041,1.13,1 11-08-2014,00:00:13.607,1.34043,1.3404,7.5,3.19 11-08-2014,00:00:14.535,1.34043,1.34041,5.25,1 11-08-2014,00:00:15.525,1.34043,1.34041,3.38,1.25 11-08-2014,00:00:17.960,1.34043,1.34041,4.5,1.25 11-08-2014,00:00:20.674,1.34042,1.3404,1.13,2.07 11-08-2014,00:00:21.191,1.34041,1.3404,1,1""" filename = 'sample.csv' f = open(filename, 'w') f.write(csv) f.close() df = pd.read_csv(filename, parse_dates={'Timestamp': ['Date', 'Time']}, index_col='Timestamp') print df.resample('6s', fill_method='bfill') print df.resample('7s', fill_method='bfill') print df.resample('11s', fill_method='bfill') print df.resample('13s', fill_method='bfill') print df.resample('17s', fill_method='bfill') ``` Thanks, Paola
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8,372
BUG: bug in non-evently divisible offsets when resampling (e.g. '7s') (GH8371)
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0
2014-09-23T18:02:55Z
2014-09-26T15:57:37Z
2014-09-26T15:57:37Z
CONTRIBUTOR
null
closes #8371 ``` In [1]: data = """date,time,value ...: 11-08-2014,00:00:01.093,1 ...: 11-08-2014,00:00:02.159,1 ...: 11-08-2014,00:00:02.667,1 ...: 11-08-2014,00:00:03.175,1 ...: 11-08-2014,00:00:07.058,1 ...: 11-08-2014,00:00:07.362,1 ...: 11-08-2014,00:00:08.324,1 ...: 11-08-2014,00:00:08.830,1 ...: 11-08-2014,00:00:08.982,1 ...: 11-08-2014,00:00:09.815,1 ...: 11-08-2014,00:00:10.540,1 ...: 11-08-2014,00:00:11.061,1 ...: 11-08-2014,00:00:11.617,1 ...: 11-08-2014,00:00:13.607,1 ...: 11-08-2014,00:00:14.535,1 ...: 11-08-2014,00:00:15.525,1 ...: 11-08-2014,00:00:17.960,1 ...: 11-08-2014,00:00:20.674,1 ...: 11-08-2014,00:00:21.191,1""" In [2]: df = pd.read_csv(StringIO(data), parse_dates={'timestamp': ['date', 'time']}, index_col='timestamp') In [3]: df Out[3]: value timestamp 2014-11-08 00:00:01.093000 1 2014-11-08 00:00:02.159000 1 2014-11-08 00:00:02.667000 1 2014-11-08 00:00:03.175000 1 2014-11-08 00:00:07.058000 1 2014-11-08 00:00:07.362000 1 2014-11-08 00:00:08.324000 1 2014-11-08 00:00:08.830000 1 2014-11-08 00:00:08.982000 1 2014-11-08 00:00:09.815000 1 2014-11-08 00:00:10.540000 1 2014-11-08 00:00:11.061000 1 2014-11-08 00:00:11.617000 1 2014-11-08 00:00:13.607000 1 2014-11-08 00:00:14.535000 1 2014-11-08 00:00:15.525000 1 2014-11-08 00:00:17.960000 1 2014-11-08 00:00:20.674000 1 2014-11-08 00:00:21.191000 1 In [4]: df.resample('6s', how='sum') Out[4]: value timestamp 2014-11-08 00:00:00 4 2014-11-08 00:00:06 9 2014-11-08 00:00:12 4 2014-11-08 00:00:18 2 In [5]: df.resample('7s', how='sum') Out[5]: value timestamp 2014-11-08 00:00:00 4 2014-11-08 00:00:07 10 2014-11-08 00:00:14 4 2014-11-08 00:00:21 1 In [6]: df.resample('11s', how='sum') Out[6]: value timestamp 2014-11-08 00:00:00 11 2014-11-08 00:00:11 8 In [7]: df.resample('13s', how='sum') Out[7]: value timestamp 2014-11-08 00:00:00 13 2014-11-08 00:00:13 6 In [8]: df.resample('17s', how='sum') Out[8]: value timestamp 2014-11-08 00:00:00 16 2014-11-08 00:00:17 3 ```
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8,373
ENH: Added file path existence check for read_hdf
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8
2014-09-23T19:00:22Z
2014-09-26T22:06:29Z
2014-09-26T22:06:18Z
CONTRIBUTOR
null
closes #7715 Added simple check for file path existence. It might be more advisable to deprecate this function and separate file buffer and file path read functionality, but the current form matches the rest of the API. I wasn't sure if there was any tests I needed to add, but if there is, let me know.
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BUG: Intersection buggy for non-monotonic non-unique indices (GH8362)
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5
2014-09-23T19:01:12Z
2014-09-29T14:28:06Z
2014-09-29T14:27:54Z
CONTRIBUTOR
null
Fixes intersection bug in the case of non-monotonic non-unique indexes. closes #8362
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8,375
categorical fixup 3
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12
2014-09-23T21:44:14Z
2018-07-06T22:06:48Z
2018-07-06T22:06:37Z
CONTRIBUTOR
null
- [ ] check that plot does the right thing, i.e. ordering of the categories - [ ] Make a utils.testing.makeCategorical() `Series(np.array(list('abcdefghij')).take(np.random.randint(0,10,size=len(df)))).astype('category')` + NaN + type + size + unique kword? - [ ] check for `self.values.xxx` in `Series` and check that the methods using such call work when values is a `Categorical`. See https://github.com/pydata/pandas/pull/7447 - [ ] Apply and Categoricals: https://github.com/pydata/pandas/issues/8065 - [ ] Categorical.searchsorted() #8420 - [x] docs: "[...] number of possible values (categories; -categories-+levels+ in R). " https://github.com/pydata/pandas/pull/8561 - [x] move assert_categorical_equal to testing.py and fix "categories" failure msg - [x] check whatsnew: In the note change "levels" to "categories" and `s/Schultz/Schulz/` - [x] docstring in #8077 (comment) - [x] add a link to "comparison with R" section from http://pandas-docs.github.io/pandas-docs-travis/comparison_with_r.html - [x] check that the memory info is doing the right thing for categorical (https://github.com/pydata/pandas/pull/7619)
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8,376
Deprecations of levels in categorical in 2017/ after 0.18
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6
2014-09-23T21:54:53Z
2016-07-15T10:30:26Z
2016-07-15T10:28:35Z
CONTRIBUTOR
null
`levels` was renamed to `categories`. Take out the deprecated property, the proerty in the Series.cat accessor, and the attribute in the constructor Look for `TODO: Remove after deprecation period in 2017/ after 0.18` and `TODO: remove levels after the deprecation period`. Should be added to #6581
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8,377
ERR/BUG: df2.fillna(df1) should raise NotImplementedError
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0
2014-09-23T22:56:51Z
2014-09-26T15:19:39Z
2014-09-26T15:19:39Z
CONTRIBUTOR
null
from [SO](http://stackoverflow.com/questions/26002564/pandas-fillna-method-with-multiindex-nans-are-filled-with-wrong-columns) `df2.fillna(df1)` should be implemented by: `df2.where(df2.notnull(),df2,df1)`
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8,378
API: .fillna will now raise a NotImplementedError when passed a DataFrame (GH8377)
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0
2014-09-23T23:24:28Z
2014-09-24T11:59:42Z
2014-09-24T11:59:42Z
CONTRIBUTOR
null
xref #8377
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BUG: floats cannot be ranked with tolerance
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37
2014-09-24T01:40:16Z
2015-03-05T12:47:34Z
2015-03-03T01:15:35Z
CONTRIBUTOR
null
closes https://github.com/pydata/pandas/issues/8365 using tolerance in ranking floats can result in inconsistent behavior; currently on master: ``` >>> pd.Series([1001, 1001.0002]).rank() 0 1 1 2 dtype: float64 >>> pd.Series([1001, 1001.0001, 1001.0002]).rank() 0 2 1 2 2 2 dtype: float64 ``` so, in effect `1001 == 1001.0002` if one takes small steps in between. on branch: ``` >>> pd.Series([1001, 1001.0002]).rank() 0 1 1 2 dtype: float64 >>> pd.Series([1001, 1001.0001, 1001.0002]).rank() 0 1 1 2 2 3 dtype: float64 ``` original issue(https://github.com/pydata/pandas/issues/8365): ``` >>> from scipy import stats >>> ts = pd.Series([1000.000669 , 1000.000041 , 1000.000059 , 1000.000063 , 1000.000121 , 1000.000104 , 1000.000040 , 1000.000062 , 1000.000095 , 1000.000091 , 1000.000050 , 1000.000074 , 1000.000063 , 1000.000076 , 1000.000083 , 1000.000061 , 1000.000030 , 1000.000069 , 1000.000090 , 1000.000116 , 1000.000058 , 1000.000074 , 1000.000035 , 1000.000084 , 1000.000067 , 1000.000072 , 1000.000105 , 1000.000091 , 1000.000077 , 1000.000040 , 1000.000108 , 1000.000117 , 1000.000114 , 1000.000117 , 1000.000099 , 1000.000039 , 1000.000046 , 1000.000105 , 1000.000057]) >>> np.all(ts.rank() == stats.rankdata(ts)) True ```
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8,380
Read_csv not correctly opening file
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2014-09-24T07:00:46Z
2015-10-20T23:11:12Z
2015-10-20T23:11:12Z
NONE
null
I'm trying to open part of a csv file using pandas read_csv. The section I am opening has a header on line 746, and goes to line 1120. ``` python df = read_csv(inputfile,header=746,nrows=374,index_col=False) ``` I then get an error CParserError: Error tokenizing data. C error: Expected 9 fields in line 1121, saw 17 The error makes sense, because in line 1121 of the file, the data changes from 9 fields to 17. What doesn't make sense is why it is trying to read line 1121, as the nrows and header should only open lines up to 1120. I can get it to work by decreasing the number of rows to below 232. This still works even if I increase the header number so it starts further down the file (eg increase it to 800). There doesn't seem to be anything special about the last line it will read, and it will read lines further in the file if I increase the header number. Other similar files work fine. The file is available at http://filedropper.com/lowerove
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8,381
groupby, as_index=False, with pandas.Series.count() as an agg
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16
2014-09-24T14:19:15Z
2015-09-30T11:37:42Z
2015-09-30T11:26:27Z
NONE
null
Why doesn't the pandas.Series.count() method work as a valid aggregation with groupby when as_index=False? ``` python df=pd.DataFrame([['foo','foo','bar','bar','bar','oats'],[1.0,2.0,3.0,4.0,4.0,5.0],[2.0,3.0,4.0,5.0,1.0,5.0]]).T df.columns=['mycat','var1','var2'] df.var1=df.var1.astype('int64') df.var2=df.var2.astype('int64') df ``` ![df](https://cloud.githubusercontent.com/assets/7581592/4389284/d795b524-43f3-11e4-8f35-3fec5299a40c.jpg) Now, if I try to do a group by ``` python df.groupby('mycat', as_index=False).var1.count() ``` Here is the error I get: ``` ValueError Traceback (most recent call last) <ipython-input-383-27b244bccb8b> in <module>() ----> 1 df.groupby('mycat', as_index=False).var1.count() /usr/local/lib/python2.7/dist-packages/pandas/core/groupby.pyc in count(self, axis) 740 741 def count(self, axis=0): --> 742 return self._count().astype('int64') 743 744 def ohlc(self): /usr/local/lib/python2.7/dist-packages/pandas/core/generic.pyc in astype(self, dtype, copy, raise_on_error) 2096 2097 mgr = self._data.astype( -> 2098 dtype=dtype, copy=copy, raise_on_error=raise_on_error) 2099 return self._constructor(mgr).__finalize__(self) 2100 /usr/local/lib/python2.7/dist-packages/pandas/core/internals.pyc in astype(self, dtype, **kwargs) 2235 2236 def astype(self, dtype, **kwargs): -> 2237 return self.apply('astype', dtype=dtype, **kwargs) 2238 2239 def convert(self, **kwargs): /usr/local/lib/python2.7/dist-packages/pandas/core/internals.pyc in apply(self, f, axes, filter, do_integrity_check, **kwargs) 2190 copy=align_copy) 2191 -> 2192 applied = getattr(b, f)(**kwargs) 2193 2194 if isinstance(applied, list): /usr/local/lib/python2.7/dist-packages/pandas/core/internals.pyc in astype(self, dtype, copy, raise_on_error, values) 319 def astype(self, dtype, copy=False, raise_on_error=True, values=None): 320 return self._astype(dtype, copy=copy, raise_on_error=raise_on_error, --> 321 values=values) 322 323 def _astype(self, dtype, copy=False, raise_on_error=True, values=None, /usr/local/lib/python2.7/dist-packages/pandas/core/internals.pyc in _astype(self, dtype, copy, raise_on_error, values, klass) 337 if values is None: 338 # _astype_nansafe works fine with 1-d only --> 339 values = com._astype_nansafe(self.values.ravel(), dtype, copy=True) 340 values = values.reshape(self.values.shape) 341 newb = make_block(values, /usr/local/lib/python2.7/dist-packages/pandas/core/common.pyc in _astype_nansafe(arr, dtype, copy) 2410 elif arr.dtype == np.object_ and np.issubdtype(dtype.type, np.integer): 2411 # work around NumPy brokenness, #1987 -> 2412 return lib.astype_intsafe(arr.ravel(), dtype).reshape(arr.shape) 2413 elif issubclass(dtype.type, compat.string_types): 2414 return lib.astype_str(arr.ravel()).reshape(arr.shape) /usr/local/lib/python2.7/dist-packages/pandas/lib.so in pandas.lib.astype_intsafe (pandas/lib.c:13456)() /usr/local/lib/python2.7/dist-packages/pandas/lib.so in util.set_value_at (pandas/lib.c:55994)() ValueError: invalid literal for long() with base 10: 'bar' ``` When i set as_index=True, I get ``` python df.groupby('mycat', as_index=True).var1.count() ``` ![df2](https://cloud.githubusercontent.com/assets/7581592/4389311/09ceabb8-43f4-11e4-91dd-115631d43f1e.jpg) When I change the agg function and set_index=False, I get a weird result tooL ``` python df.groupby('mycat', as_index=False).var1.agg(np.count_nonzero) ``` ![df3](https://cloud.githubusercontent.com/assets/7581592/4389480/7f755122-43f5-11e4-9878-3fcecf1ea704.jpg) UPDATE: Realized my last result was not counting correctly and am now thoroughly confused.
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TST: numpy 1.9 / matplotlib 1.4.0 on 3.4-64 bit windows
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11
2014-09-24T19:54:04Z
2014-09-27T13:08:26Z
2014-09-27T13:08:26Z
CONTRIBUTOR
null
These passed on numpy 1.8/matplotlib 1.3.1 on 34-64 windows just updated and now failing ``` ====================================================================== ERROR: test_boxplot_empty_column (pandas.tests.test_graphics.TestDataFramePlots) ---------------------------------------------------------------------- Traceback (most recent call last): File "c:\Users\Jeff Reback\Documents\GitHub\pandas\build\lib.win-amd64-3.4\pandas\tests\test_graphics.py", line 1980, in test_boxplot_empty_column _check_plot_works(df.boxplot, return_type='axes') File "c:\Users\Jeff Reback\Documents\GitHub\pandas\build\lib.win-amd64-3.4\pandas\tests\test_graphics.py", line 3349, in _check_plot_works ret = f(*args, **kwargs) File "c:\Users\Jeff Reback\Documents\GitHub\pandas\build\lib.win-amd64-3.4\pandas\core\frame.py", line 4921, in boxplot **kwds) File "c:\Users\Jeff Reback\Documents\GitHub\pandas\build\lib.win-amd64-3.4\pandas\tools\plotting.py", line 2634, in boxplot result = plot_group(columns, data.values.T, ax) File "c:\Users\Jeff Reback\Documents\GitHub\pandas\build\lib.win-amd64-3.4\pandas\tools\plotting.py", line 2585, in plot_group bp = ax.boxplot(values, **kwds) File "C:\Python34-64\lib\site-packages\matplotlib\axes\_axes.py", line 3045, in boxplot labels=labels) File "C:\Python34-64\lib\site-packages\matplotlib\cbook.py", line 1965, in boxplot_stats q1, med, q3 = np.percentile(x, [25, 50, 75]) File "C:\Python34-64\lib\site-packages\numpy\lib\function_base.py", line 3042, in percentile interpolation=interpolation) File "C:\Python34-64\lib\site-packages\numpy\lib\function_base.py", line 2791, in _ureduce r = func(a, **kwargs) File "C:\Python34-64\lib\site-packages\numpy\lib\function_base.py", line 3131, in _percentile x1 = take(ap, indices_below, axis=axis) * weights_below File "C:\Python34-64\lib\site-packages\numpy\core\fromnumeric.py", line 121, in take return take(indices, axis, out, mode) IndexError: cannot do a non-empty take from an empty axes. ====================================================================== FAIL: test_boxplot (pandas.tests.test_graphics.TestDataFramePlots) ---------------------------------------------------------------------- Traceback (most recent call last): File "c:\Users\Jeff Reback\Documents\GitHub\pandas\build\lib.win-amd64-3.4\pandas\tests\test_graphics.py", line 1794, in test_boxplot self.assertEqual(len(ax.lines), 8 * len(numeric_cols)) AssertionError: 21 != 24 ====================================================================== FAIL: test_boxplot_vertical (pandas.tests.test_graphics.TestDataFramePlots) ---------------------------------------------------------------------- Traceback (most recent call last): File "c:\Users\Jeff Reback\Documents\GitHub\pandas\build\lib.win-amd64-3.4\pandas\tests\test_graphics.py", line 1828, in test_boxplot_vertical self.assertEqual(len(ax.lines), 8 * len(numeric_cols)) AssertionError: 21 != 24 ---------------------------------------------------------------------- Ran 7882 tests in 724.270s FAILED (SKIP=267, errors=1, failures=2) ```
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8,383
nanmin no longer works with series
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25
2014-09-24T20:01:52Z
2018-02-19T13:50:57Z
2018-02-19T13:50:57Z
NONE
null
Using NumPy's nanmin on a pandas Series worked as expected, now however the Series is returned with each element set to the minimum, rather than just getting the minimum. Not sure if this is a Numpy of Pandas issue. ``` np.nanmin(pds.Series([1,2,3,4])) Out[14]: 0 1 1 1 2 1 3 1 dtype: int64 np.min(pds.Series([1,2,3,4])) Out[15]: 1 ```
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43,830,566
MDExOlB1bGxSZXF1ZXN0MjE3NTQ3Njc=
8,384
non-existent columns in DataFrame.dropna subset argument now raises KeyError
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1
2014-09-25T00:31:10Z
2014-09-26T14:35:25Z
2014-09-26T14:35:18Z
CONTRIBUTOR
null
closes #8303. Now instead of interpreting a bad column name as the 'last column' of the `DataFrame`, `dropna` will raise a `KeyError` instead. unit test and release note now included.
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ENH: add the parameter dropna to the function to_dict.
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10
2014-09-25T08:49:11Z
2015-05-14T15:47:33Z
2015-05-09T16:09:38Z
NONE
null
this is usefull because you cant reach the same effect by just using dropna().to_dict() also see http://stackoverflow.com/questions/26033301/make-pandas-dataframe-to-a-dict-and-dropna/26033302#26033302
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8,386
Not all DateOffsets are comparable
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4
2014-09-25T10:45:54Z
2020-03-10T05:19:05Z
2020-03-10T05:19:05Z
NONE
null
``` python >>> from pandas.tseries.frequencies import to_offset as _to_offset >>> _to_offset('D') < _to_offset('H') False >>> _to_offset('D') < _to_offset('W') --------------------------------------------------------------------------- AttributeError Traceback (most recent call last) <ipython-input-14-77799b586280> in <module>() ----> 1 _to_offset('D') < _to_offset('W') C:\Anaconda\lib\site-packages\pandas\tseries\offsets.pyc in f(self, other) 1873 def _tick_comp(op): 1874 def f(self, other): -> 1875 return op(self.delta, other.delta) 1876 1877 return f AttributeError: 'Week' object has no attribute 'delta' >>> pd.show_versions() INSTALLED VERSIONS ------------------ commit: None python: 2.7.7.final.0 python-bits: 64 OS: Windows OS-release: 8 machine: AMD64 processor: Intel64 Family 6 Model 42 Stepping 7, GenuineIntel byteorder: little LC_ALL: None LANG: None pandas: 0.14.0 nose: 1.3.3 Cython: 0.20.1 numpy: 1.8.1 scipy: 0.14.0 statsmodels: 0.5.0 IPython: 2.1.0 sphinx: 1.2.2 patsy: 0.2.1 scikits.timeseries: None dateutil: 1.5 pytz: 2014.3 bottleneck: None tables: 3.1.1 numexpr: 2.3.1 matplotlib: 1.3.1 openpyxl: 1.8.5 xlrd: 0.9.3 xlwt: 0.7.5 xlsxwriter: 0.5.5 lxml: 3.3.5 bs4: 4.3.1 html5lib: None bq: None apiclient: None rpy2: None sqlalchemy: 0.9.4 pymysql: None psycopg2: None ```
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8,387
Pandas ignores index when assigning different dtypes.
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1
2014-09-25T11:06:51Z
2014-09-29T15:19:49Z
2014-09-29T15:19:49Z
NONE
null
Consider the following example: ``` python import pandas foo = pandas.Series( [ 0, 1, 2, 0 ] ) w = foo > 0 bar = foo[ w ].map( str ) print bar foo[w] = bar print foo foo[w] = bar print foo ``` gives the following output ``` 1 1 2 2 dtype: object 0 0 1 NaN 2 1 3 0 dtype: object 0 0 1 1 2 2 3 0 dtype: object ``` It looks as if in the first assignemend `foo[w] = bar` the matching index of both sides is ignored. Is this a bug or documented behavior?
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EHN: Allow DataFrame.fillna to accept a DataFrame as its fill value.
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1
2014-09-25T13:47:28Z
2014-09-26T19:11:04Z
2014-09-26T15:19:39Z
CONTRIBUTOR
null
Related: [SO](http://stackoverflow.com/q/26002564/190597) Fixes #8377
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BUG: HDFStore doesn't support a Panel with MultiIndex when format='table'
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18
2014-09-25T16:16:15Z
2018-07-06T20:21:05Z
2017-07-11T09:56:19Z
CONTRIBUTOR
null
Looks like I can `append()` to an `HDFStore` object a `DataFrame` with a `MultiIndex`, but not a `Panel` with a `MultiIndex`. Similarly `put`ing the `Panel` with `format='fixed'` works, but with `format='table'` doesn't. So the problem appears to be with the table format. ``` Python 3.4.1 (v3.4.1:c0e311e010fc, May 18 2014, 10:45:13) [MSC v.1600 64 bit (AMD64)] Type "copyright", "credits" or "license" for more information. IPython 2.2.0 -- An enhanced Interactive Python. ? -> Introduction and overview of IPython's features. %quickref -> Quick reference. help -> Python's own help system. object? -> Details about 'object', use 'object??' for extra details. In [1]: from pandas import MultiIndex, DataFrame, Panel, HDFStore, show_versions In [2]: mi = MultiIndex.from_tuples([('A','a'), ('A','b')]) In [3]: df = DataFrame([0., 1.], index=mi, columns=['X']) In [4]: p = Panel([[[0, 1]]], items=['X'], major_axis=['Y'], minor_axis=mi) In [5]: store = HDFStore('foo.h5') In [6]: store.append('df', df) In [7]: store.append('p', p) --------------------------------------------------------------------------- TypeError Traceback (most recent call last) <ipython-input-7-46ccb1da2f9f> in <module>() ----> 1 store.append('p', p) C:\Python34\lib\site-packages\pandas\io\pytables.py in append(self, key, value, format, append, columns, dropna, **kwargs) 909 kwargs = self._validate_format(format, kwargs) 910 self._write_to_group(key, value, append=append, dropna=dropna, --> 911 **kwargs) 912 913 def append_to_multiple(self, d, value, selector, data_columns=None, C:\Python34\lib\site-packages\pandas\io\pytables.py in _write_to_group(self, key, value, format, index, append, complib, encoding, **kwargs) 1268 1269 # write the object -> 1270 s.write(obj=value, append=append, complib=complib, **kwargs) 1271 1272 if s.is_table and index: C:\Python34\lib\site-packages\pandas\io\pytables.py in write(self, obj, axes, append, complib, complevel, fletcher32, min_itemsize, chunksize, expectedrows, dropna, **kwargs) 3603 self.create_axes(axes=axes, obj=obj, validate=append, 3604 min_itemsize=min_itemsize, -> 3605 **kwargs) 3606 3607 if not self.is_exists: C:\Python34\lib\site-packages\pandas\io\pytables.py in create_axes(self, axes, obj, validate, nan_rep, data_columns, min_itemsize, **kwargs) 3168 index_axes_map[i] = _convert_index( 3169 a, self.encoding, self.format_type -> 3170 ).set_name(name).set_axis(i) 3171 else: 3172 C:\Python34\lib\site-packages\pandas\io\pytables.py in _convert_index(index, encoding, format_type) 4082 4083 if isinstance(index, MultiIndex): -> 4084 raise TypeError('MultiIndex not supported here!') 4085 4086 inferred_type = lib.infer_dtype(index) TypeError: MultiIndex not supported here! In [13]: store.put('f', p, format='fixed') In [14]: store.put('t', p, format='table') --------------------------------------------------------------------------- TypeError Traceback (most recent call last) <ipython-input-14-f6e096e264c1> in <module>() ----> 1 store.put('t', p, format='table') C:\Python34\lib\site-packages\pandas\io\pytables.py in put(self, key, value, format, append, **kwargs) 816 format = get_option("io.hdf.default_format") or 'fixed' 817 kwargs = self._validate_format(format, kwargs) --> 818 self._write_to_group(key, value, append=append, **kwargs) 819 820 def remove(self, key, where=None, start=None, stop=None): C:\Python34\lib\site-packages\pandas\io\pytables.py in _write_to_group(self, key, value, format, index, append, complib, encoding, **kwargs) 1268 1269 # write the object -> 1270 s.write(obj=value, append=append, complib=complib, **kwargs) 1271 1272 if s.is_table and index: C:\Python34\lib\site-packages\pandas\io\pytables.py in write(self, obj, axes, append, complib, complevel, fletcher32, min_itemsize, chunksize, expectedrows, dropna, **kwargs) 3603 self.create_axes(axes=axes, obj=obj, validate=append, 3604 min_itemsize=min_itemsize, -> 3605 **kwargs) 3606 3607 if not self.is_exists: C:\Python34\lib\site-packages\pandas\io\pytables.py in create_axes(self, axes, obj, validate, nan_rep, data_columns, min_itemsize, **kwargs) 3168 index_axes_map[i] = _convert_index( 3169 a, self.encoding, self.format_type -> 3170 ).set_name(name).set_axis(i) 3171 else: 3172 C:\Python34\lib\site-packages\pandas\io\pytables.py in _convert_index(index, encoding, format_type) 4082 4083 if isinstance(index, MultiIndex): -> 4084 raise TypeError('MultiIndex not supported here!') 4085 4086 inferred_type = lib.infer_dtype(index) TypeError: MultiIndex not supported here! In [9]: show_versions() INSTALLED VERSIONS ------------------ commit: None python: 3.4.1.final.0 python-bits: 64 OS: Windows OS-release: 7 machine: AMD64 processor: Intel64 Family 6 Model 58 Stepping 9, GenuineIntel byteorder: little LC_ALL: None LANG: None pandas: 0.14.1 nose: 1.3.4 Cython: 0.21 numpy: 1.9.0 scipy: 0.14.0 statsmodels: 0.5.0 IPython: 2.2.0 sphinx: 1.2.3 patsy: 0.3.0 scikits.timeseries: None dateutil: 2.2 pytz: 2014.7 bottleneck: 0.8.0 tables: 3.1.1 numexpr: 2.4 matplotlib: 1.4.0 openpyxl: None xlrd: None xlwt: None xlsxwriter: None lxml: None bs4: None html5lib: None httplib2: None apiclient: None rpy2: None sqlalchemy: 0.9.7 pymysql: None psycopg2: None ```
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BUG/VIS: Pie Plot with subplots doesn't include NaNs in legend
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1
2014-09-25T16:54:34Z
2018-07-06T22:04:19Z
2018-07-06T22:04:10Z
CONTRIBUTOR
null
Followup to https://github.com/pydata/pandas/pull/8307 ``` In [1]: df = pd.DataFrame(np.random.rand(4, 4)) In [2]: df2 = df.copy() In [3]: for i in range(len(df)): ...: df.iloc[i, i] = np.nan ...: In [4]: fig, axes = plt.subplots(figsize=(16, 8), nrows=2, ncols=4) In [5]: df.plot(kind='pie', subplots=True, ax=axes.ravel()[:4]) In [6]: df2.plot(kind='pie', subplots=True, ax=axes.ravel()[4:]) ``` ![ex](https://cloud.githubusercontent.com/assets/1312546/4320249/881bf944-3f35-11e4-85c8-bb5c4d539435.png) Right now, when `subplots=True`, the NaN/zero labels aren't being put in the legend (or they aren't showing up). ``` In [8]: df[0].plot(kind='pie', figsize=(4,4), legend=True) ``` ![ex2](https://cloud.githubusercontent.com/assets/1312546/4320269/b75df6ee-3f35-11e4-9774-50f8aed26594.png) Not a huge priority, we'll see if anyone notices and wants to implement a fix. I think it would involve refactoring all our legend and ticklabels code to be subplot aware.
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DOC: Use square figsize for pie plots
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2
2014-09-25T17:06:53Z
2015-08-18T12:44:59Z
2014-10-04T18:01:29Z
CONTRIBUTOR
null
First commit closes https://github.com/pydata/pandas/issues/8308 second closes https://github.com/pydata/pandas/issues/8312 aside from using mpl 1.4 to build the docs. I can post any examples if you want.
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ENH/BUG/DOC: HDFStore.append() on axis other than DataFrame.index or Panel.major_axis
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6
2014-09-25T18:08:51Z
2014-09-26T18:54:21Z
null
CONTRIBUTOR
null
For DataFrames, `HDFStore.append()` works only when "appending" along the `index` direction, i.e. it expects the `columns` to be the same. See sample below. This doesn't appear to be documented. If can only append along a single axis, would be nice to be able to specify which. Similarly for Panels, it appears to work only along the `major_axis`. I haven't checked with Panel4D. ``` Python 3.4.1 (v3.4.1:c0e311e010fc, May 18 2014, 10:45:13) [MSC v.1600 64 bit (AMD64)] Type "copyright", "credits" or "license" for more information. IPython 2.2.0 -- An enhanced Interactive Python. ? -> Introduction and overview of IPython's features. %quickref -> Quick reference. help -> Python's own help system. object? -> Details about 'object', use 'object??' for extra details. In [1]: from pandas import DataFrame, HDFStore In [2]: df1 = DataFrame(1., index=range(2), columns=['A','B']) In [3]: df2 = DataFrame(2., index=range(2,4), columns=['A','B']) In [4]: store = HDFStore('bar.h5') In [5]: store.append('df', df1) In [6]: store.append('df', df2) In [7]: store.append('df_transpose', df1.transpose()) In [8]: store.append('df_transpose', df2.transpose()) --------------------------------------------------------------------------- ValueError Traceback (most recent call last) <ipython-input-8-1d42b87002f5> in <module>() ----> 1 store.append('df_transpose', df2.transpose()) C:\Python34\lib\site-packages\pandas\io\pytables.py in append(self, key, value, format, append, columns, dropna, **kwargs) 909 kwargs = self._validate_format(format, kwargs) 910 self._write_to_group(key, value, append=append, dropna=dropna, --> 911 **kwargs) 912 913 def append_to_multiple(self, d, value, selector, data_columns=None, C:\Python34\lib\site-packages\pandas\io\pytables.py in _write_to_group(self, key, value, format, index, append, complib, encoding, **kwargs) 1268 1269 # write the object -> 1270 s.write(obj=value, append=append, complib=complib, **kwargs) 1271 1272 if s.is_table and index: C:\Python34\lib\site-packages\pandas\io\pytables.py in write(self, obj, axes, append, complib, complevel, fletcher32, min_itemsize, chunksize, expectedrows, dropna, **kwargs) 3603 self.create_axes(axes=axes, obj=obj, validate=append, 3604 min_itemsize=min_itemsize, -> 3605 **kwargs) 3606 3607 if not self.is_exists: C:\Python34\lib\site-packages\pandas\io\pytables.py in create_axes(self, axes, obj, validate, nan_rep, data_columns, min_itemsize, **kwargs) 3246 "cannot match existing table structure for [%s] on " 3247 "appending data" % ','.join(com.pprint_thing(item) for -> 3248 item in items)) 3249 blocks = new_blocks 3250 blk_items = new_blk_items ValueError: cannot match existing table structure for [0,1] on appending data In [9]: from pandas import show_versions In [10]: show_versions() INSTALLED VERSIONS ------------------ commit: None python: 3.4.1.final.0 python-bits: 64 OS: Windows OS-release: 7 machine: AMD64 processor: Intel64 Family 6 Model 58 Stepping 9, GenuineIntel byteorder: little LC_ALL: None LANG: None pandas: 0.14.1 nose: 1.3.4 Cython: 0.21 numpy: 1.9.0 scipy: 0.14.0 statsmodels: 0.5.0 IPython: 2.2.0 sphinx: 1.2.3 patsy: 0.3.0 scikits.timeseries: None dateutil: 2.2 pytz: 2014.7 bottleneck: 0.8.0 tables: 3.1.1 numexpr: 2.4 matplotlib: 1.4.0 openpyxl: None xlrd: None xlwt: None xlsxwriter: None lxml: None bs4: None html5lib: None httplib2: None apiclient: None rpy2: None sqlalchemy: 0.9.7 pymysql: None psycopg2: None ```
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TST: Fix failing pie plot tests
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2014-09-25T18:41:16Z
2017-04-05T02:05:56Z
2014-09-25T19:46:38Z
CONTRIBUTOR
null
Fixes the build failures from merging https://github.com/pydata/pandas/pull/8307
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BUG: apply mask to aligned new values
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5
2014-09-26T03:27:22Z
2014-10-01T00:32:59Z
2014-09-29T15:19:28Z
CONTRIBUTOR
null
closes https://github.com/pydata/pandas/issues/8387
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BUG: fix Panel.fillna() ignoring axis parameter
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18
2014-09-26T05:26:38Z
2015-10-26T22:40:03Z
2015-07-12T14:58:11Z
CONTRIBUTOR
null
This fixes #8251. It may need some more comprehensive tests but before I go too much farther I want to make sure the axis numbering scheme makes sense . The default behavior of `fillna` is to fill along `axis=0`. In the case of a DataFrame this fills along the columns. However, in the case of a Panel, filling along `axis=0` means you're filling along items. I'm not sure if that's the behavior that most users would think is the default. You might note that I also removed the references to what the behavior of each axis value is in the docstring since it gets a bit arbitrary when you consider both DataFrames and Panels.
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BUG: maintain order in excluding categories
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8
2014-09-26T14:05:10Z
2014-09-26T18:32:01Z
2014-09-26T14:44:05Z
CONTRIBUTOR
null
should fix current travis fails on master branch. i cannot add tests right now because `test_remove_categories` in `test_categorical.py` does not fail on my machine. it also passes on a number of travis builds, and fails only on a couple.
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TST: Catch Warnings in tests
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7
2014-09-26T14:59:06Z
2017-03-23T13:46:36Z
2017-03-23T13:46:36Z
CONTRIBUTOR
null
If only to have nicer looking test output. ``` .../Users/tom/Envs/py3/lib/python3.4/site-packages/pandas/pandas/tools/plotting.py:3229: UserWarning: To output multiple subplots, the figure containing the passed axes is being cleared "is being cleared", UserWarning) ../Users/tom/Envs/py3/lib/python3.4/site-packages/pandas/pandas/tools/plotting.py:3212: UserWarning: When passing multiple axes, sharex and sharey are ignored.These settings must be specified when creating axes "These settings must be specified when creating axes", UserWarning) ............................S..S.../Users/tom/Envs/py3/lib/python3.4/site-packages/matplotlib-1.5.x-py3.4-macosx-10.9-x86_64.egg/matplotlib/axes/_axes.py:475: UserWarning: No labelled objects found. Use label='...' kwarg on individual plots. warnings.warn("No labelled objects found. " .S.............................................../Users/tom/Envs/py3/lib/python3.4/site-packages/pandas/pandas/tools/plotting.py:3209: UserWarning: When passing multiple axes, layout keyword is ignored warnings.warn("When passing multiple axes, layout keyword is ignored", UserWarning) ```
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TST: Skip failing boxplot tests on mpl 1.4+
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1
2014-09-26T15:00:41Z
2017-04-05T02:05:56Z
2014-09-27T13:08:26Z
CONTRIBUTOR
null
Closes https://github.com/pydata/pandas/issues/8382
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BUG: inconsisten panel indexing with aligning frame (GH7763)
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0
2014-09-26T23:36:27Z
2014-09-26T23:36:40Z
2014-09-26T23:36:40Z
CONTRIBUTOR
null
closes #7763
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2014-09-26T23:47:03Z
2014-09-29T21:42:52Z
2014-09-29T21:42:44Z
NONE
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Numpy changed the names of their data types in 1.8 http://docs.scipy.org/doc/numpy-dev/user/basics.types.html specifically, bool, int, float, and complex are now bool_, int_, float_ and complex_ this requires changing the VECTOR_TYPES and NA_TYPES dictionaries used by convert_to_r_dataframe in pandas/rpy/common.py numpy 1.7 isn't feasible to include as a project dependency (too many packages require 1.8) Unfortunately, bool_ etc don't exist in numpy < 1.8, so you'll have to try/except that bit. I can change it and submit a pull request if you like
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