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1
"2012-10-01T08:52:44Z"
"2014-07-13T10:22:41Z"
"2012-10-01T19:52:28Z"
NONE
null
1959 closed by mistake doing cleanup.
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1
"2012-10-01T12:47:03Z"
"2012-11-24T21:35:06Z"
"2012-11-24T21:35:05Z"
CONTRIBUTOR
null
add an argument, min_i (minimum intersection) to nancorr in pandas.src.moments.pyx this will nan the element if the nobs is < min_i (which should default to 1 to replicate current operations) need to also propogate argument to: core.frame.corr/cov possibly add to: core.series.corr/cov ``` @cython.boundscheck(False) @cython.wraparound(False) def nancorr(ndarray[float64_t, ndim=2] mat, cov=False, min_i=1): cdef: Py_ssize_t i, j, xi, yi, N, K ndarray[float64_t, ndim=2] result ndarray[uint8_t, ndim=2] mask int64_t nobs = 0 float64_t vx, vy, sumx, sumy, sumxx, sumyy, meanx, meany, divisor N, K = (<object> mat).shape result = np.empty((K, K), dtype=np.float64) mask = np.isfinite(mat).view(np.uint8) for xi in range(K): for yi in range(xi + 1): nobs = sumxx = sumyy = sumx = sumy = 0 for i in range(N): if mask[i, xi] and mask[i, yi]: vx = mat[i, xi] vy = mat[i, yi] nobs += 1 sumx += vx sumy += vy #### change from nobs == 0 #### if nobs < min_i: result[xi, yi] = result[yi, xi] = np.NaN else: meanx = sumx / nobs meany = sumy / nobs # now the cov numerator sumx = 0 for i in range(N): if mask[i, xi] and mask[i, yi]: vx = mat[i, xi] - meanx vy = mat[i, yi] - meany sumx += vx * vy sumxx += vx * vx sumyy += vy * vy divisor = (nobs - 1.0) if cov else sqrt(sumxx * sumyy) if divisor != 0: result[xi, yi] = result[yi, xi] = sumx / divisor else: result[xi, yi] = result[yi, xi] = np.NaN return result ```
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concat() ignores ignore_index=True
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2
"2012-10-01T15:21:16Z"
"2012-11-18T22:08:33Z"
"2012-11-18T22:08:33Z"
NONE
null
Unless I misunderstood what the documentation says, this is not the intended behavior: df1 = pandas.DataFrame({'a':np.arange(5),'b':np.arange(5)},index=3+np.arange(5)) df2 = pandas.DataFrame({'c':np.arange(5),'d':np.arange(5)}) pandas.concat([df1,df2],axis=1,ignore_index=False) a b c d 0 NaN NaN 0 0 1 NaN NaN 1 1 2 NaN NaN 2 2 3 0 0 3 3 4 1 1 4 4 5 2 2 NaN NaN 6 3 3 NaN NaN 7 4 4 NaN NaN The following function does a work-around for this bug by explicitly re-setting the index: def myConcat(df1,df2): if df1.shape[0] != df2.shape[0]: return False else: df2.index = df1.index return pandas.concat((df1,df2),axis=1) Pandas version: commit de6cce5dde22870e279d495c25013a5696bc31df
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2,004
Series slicing with None returns array?
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3
"2012-10-01T19:26:36Z"
"2012-11-03T18:08:58Z"
"2012-11-03T18:08:58Z"
CONTRIBUTOR
null
Is this a bug? Definitely was unexpected. ``` y = pandas.Series(np.random.random(10)) type(y[:,None]) ```
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More Unicode, factor out pprinting of labels and names
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8
"2012-10-02T00:39:30Z"
"2012-10-12T23:36:15Z"
"2012-10-12T23:36:03Z"
NONE
null
addresses the same issue in 72ed09d applied to other occurences in the tree, factored out the pprint code to a helper. now supports pprinting of heterogeneous nested-nested-nested tuples with unicode strings, FTW.
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always use UnicodeWriter for csv, default to utf-8
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2
"2012-10-02T02:02:58Z"
"2012-10-11T15:55:49Z"
"2012-10-11T15:55:49Z"
NONE
null
see long commit message for the rational.
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7,290,814
MDU6SXNzdWU3MjkwODE0
2,007
importing pandas 0.9 breaks matplotlib plot_date
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8
"2012-10-02T12:00:33Z"
"2016-10-12T23:03:14Z"
"2012-10-05T00:56:46Z"
CONTRIBUTOR
null
``` import datetime import sys import numpy from matplotlib import pyplot import pandas;print(pandas.__version__); #comment out this line to have it work fig = pyplot.figure() ax = fig.add_subplot(1, 1, 1) dates = [datetime.date(2008, 12, 31), datetime.date(2009, 1, 31)] values1 = numpy.arange(10.0, 11.0, 0.5) values2 = numpy.arange(11.0, 12.0, 0.5) kw = dict(fmt='-', lw=4) ax.plot_date([x.toordinal() for x in dates], values1, **kw) ax.plot_date([x.toordinal() for x in dates], values2, **kw) fig.show() raw_input("press 'enter' to end") ```
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7,295,879
MDU6SXNzdWU3Mjk1ODc5
2,008
set_index breaks depending on column name or number
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4
"2012-10-02T15:16:42Z"
"2012-11-05T01:09:51Z"
"2012-11-05T01:09:51Z"
NONE
null
I get a very strange behaviour with pandas current dev version (tagged as '0.9.0rc2') : Calling set_index() on a DataFrame breaks depending on the columns name I use !!! This code fails : ``` python df3 = DataFrame({ '0001-INTERNAL_PRODUCT_CODE': {('A', 'A0006000', 'nuit'): 'A0006000'}, '0004-PACKAGING_LANGUAGE_CODE': {('A', 'A0006000', 'nuit'): nan}, '1050-LOCALISED_DESCRIPTION': {('A', 'A0006000', 'nuit'): nan}, '0024-PRODUCT_BAR_CODED': {('A', 'A0006000', 'nuit'): nan}, 'Source system': {('A', 'A0006000', 'nuit'): 'A'}, '0027-LOCAL_COMMERCIAL_AUTHORIZATION': {('A', 'A0006000', 'nuit'): nan}, }) df3.set_index(['0001-INTERNAL_PRODUCT_CODE', '1050-LOCALISED_DESCRIPTION']) # fails ! ``` But If I change the indexed column names to 'a' and 'x', It works : ``` python df3 = DataFrame({ 'a': {('A', 'A0006000', 'nuit'): 'A0006000'}, '0004-PACKAGING_LANGUAGE_CODE': {('A', 'A0006000', 'nuit'): nan}, 'x': {('A', 'A0006000', 'nuit'): nan}, '0024-PRODUCT_BAR_CODED': {('A', 'A0006000', 'nuit'): nan}, 'Source system': {('A', 'A0006000', 'nuit'): 'A'}, '0027-LOCAL_COMMERCIAL_AUTHORIZATION': {('A', 'A0006000', 'nuit'): nan}, }) df3.set_index(['a', 'x']) # works ! ``` At first I thought It was related to column name .... but If I keep my exotic column name and remove one column (one not used by set_index), it works !! : ``` python df3 = DataFrame({ '0001-INTERNAL_PRODUCT_CODE': {('A', 'A0006000', 'nuit'): 'A0006000'}, '1050-LOCALISED_DESCRIPTION': {('A', 'A0006000', 'nuit'): nan}, '0024-PRODUCT_BAR_CODED': {('A', 'A0006000', 'nuit'): nan}, 'Source system': {('A', 'A0006000', 'nuit'): 'A'}, '0027-LOCAL_COMMERCIAL_AUTHORIZATION': {('A', 'A0006000', 'nuit'): nan}, }) df3.set_index(['0001-INTERNAL_PRODUCT_CODE', '1050-LOCALISED_DESCRIPTION']) # works ! ```
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2,009
ENH: Use given name for DataFrame column name for FRED API
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1
"2012-10-02T19:07:00Z"
"2014-07-29T05:06:43Z"
"2012-10-05T00:20:42Z"
CONTRIBUTOR
null
Go ahead and use the given name for the series name instead of the generic VALUE. Makes grabbing and joining multiple series a bit easier, though I suspect there's a way to do this through the API.
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2,010
Setting the x margin in a plot of a data frame with a DatetimeIndex is ignored.
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6
"2012-10-02T19:09:13Z"
"2016-09-22T17:21:30Z"
"2014-03-09T15:21:07Z"
CONTRIBUTOR
null
from [mailing list](https://groups.google.com/forum/?fromgroups=#!searchin/pystatsmodels/pandas$20plot$20with$20DatetimeIndex$20ignore$20x$20axis$20margin/pystatsmodels/9ZQkzoSibSE/jvU35qVeasUJ) Hello, I noticed that setting the x margin in a plot of a data frame with a DatetimeIndex is ignored. Example plot: ![Example plot](http://i.imgur.com/ZOqmJ.png) ``` python #!/usr/bin/python from matplotlib.pyplot import * from pandas import * from pylab import show fig, axes = subplots(2,1) df1 = DataFrame([0.5,1,1.5,2,2.5,3,3.5]) df1.plot(ax=axes[0],drawstyle='steps',style='g') # this x axis margin is honored axes[0].margins(0.05,0.05) df2 = DataFrame([0.5,1.5,2.5,3.5],index=date_range('1-1-2000',periods=4)) df2.plot(ax=axes[1],drawstyle='steps',style='r') # this x axis margin is ignored axes[1].margins(0.05,0.05) show() ```
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7,306,610
MDU6SXNzdWU3MzA2NjEw
2,011
io.data._sanitize_dates behavior vs. docs
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1
"2012-10-02T21:35:48Z"
"2012-10-05T00:55:29Z"
"2012-10-05T00:55:19Z"
CONTRIBUTOR
null
Docs say default start for DataReader should be 2010-1-1, but it returns 1 year ago from today. I prefer the docs. Thoughts? ``` >>> from pandas.io.data import _sanitize_dates >>> _sanitize_dates(None, None) (datetime.datetime(2011, 10, 3, 17, 32, 52, 969119), datetime.datetime(2012, 10, 2, 17, 32, 52, 969163)) ```
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2,012
Fix naming of ewmvar and ewmstd in documentation
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"2012-10-03T13:18:37Z"
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"2012-10-05T18:44:33Z"
CONTRIBUTOR
null
These functions were misnamed in the documentation, I was quite confused for a while until I figured out where they were so I thought I'd fix it. ewstd should have been ewmstd and ewvar should have been ewmvar.
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2,013
BUG: dict comprehension in (af3e13c4) broke 2.6 test suite
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"2014-07-22T13:35:56Z"
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NONE
null
fixes #2001
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2,014
BLD: quiet tox warning about missing dep
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"2012-10-03T22:28:06Z"
"2014-06-27T22:56:10Z"
"2013-04-10T06:43:27Z"
CONTRIBUTOR
null
The examples in documentation did not render very nicely.
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DOC: update parsers header, names args doc
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CONTRIBUTOR
null
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7,360,796
MDU6SXNzdWU3MzYwNzk2
2,017
reset_index fails with MultiIndex in columns
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4
"2012-10-04T19:39:27Z"
"2012-10-05T07:14:46Z"
"2012-10-05T00:41:37Z"
NONE
null
``` import pandas as pd import numpy as np df = pd.DataFrame([(1,2,3), (4,5,6)], columns = ['a','b','c']) df.groupby(['a']).agg({'b': [np.mean, np.sum]}).reset_index() --------------------------------------------------------------------------- Exception Traceback (most recent call last) <ipython-input-1-a362e367701d> in <module>() 2 import numpy as np 3 df = pd.DataFrame([(1,2,3), (4,5,6)], columns = ['a','b','c']) ----> 4 df.groupby(['a']).agg({'b': [np.mean, np.sum]}).reset_index() /usr/local/lib/python2.7/dist-packages/pandas-0.9.0rc2-py2.7-linux-x86_64.egg/pandas/core/frame.pyc in reset_index(self, level, drop, inplace) 2522 if name is None or name == 'index': 2523 name = 'index' if 'index' not in self else 'level_0' -> 2524 new_obj.insert(0, name, _maybe_cast(self.index.values)) 2525 2526 new_obj.index = new_index /usr/local/lib/python2.7/dist-packages/pandas-0.9.0rc2-py2.7-linux-x86_64.egg/pandas/core/frame.pyc in insert(self, loc, column, value) 1857 """ 1858 value = self._sanitize_column(column, value) -> 1859 self._data.insert(loc, column, value) 1860 1861 def _sanitize_column(self, key, value): /usr/local/lib/python2.7/dist-packages/pandas-0.9.0rc2-py2.7-linux-x86_64.egg/pandas/core/internals.pyc in insert(self, loc, item, value) 899 raise Exception('cannot insert %s, already exists' % item) 900 --> 901 new_items = self.items.insert(loc, item) 902 self.set_items_norename(new_items) 903 /usr/local/lib/python2.7/dist-packages/pandas-0.9.0rc2-py2.7-linux-x86_64.egg/pandas/core/index.pyc in insert(self, loc, item) 2340 if not isinstance(item, tuple) or len(item) != self.nlevels: 2341 raise Exception("%s cannot be inserted in this MultiIndex" -> 2342 % str(item)) 2343 2344 new_levels = [] Exception: a cannot be inserted in this MultiIndex ```
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7,360,911
MDU6SXNzdWU3MzYwOTEx
2,018
Confusing pd.to_datetime behavior
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5
"2012-10-04T19:44:28Z"
"2014-08-07T10:32:22Z"
"2012-11-03T19:21:36Z"
NONE
null
The docstring says ## Parameters arg : string, datetime, array of strings (with possible NAs) Without any date format option. I do get some weird output though: ``` In [4]: pd.to_datetime('121001') Out[4]: datetime.datetime(2012, 10, 1, 0, 0) In [5]: pd.to_datetime('121001', dayfirst=True) Out[5]: datetime.datetime(2012, 10, 1, 0, 0) In [6]: pd.to_datetime(['121001']) --------------------------------------------------------------------------- ValueError Traceback (most recent call last) <ipython-input-6-e09fc721e662> in <module>() ----> 1 pd.to_datetime(['121001']) /usr/local/lib/python2.7/dist-packages/pandas-0.9.0rc2-py2.7-linux-x86_64.egg/pandas/tseries/tools.pyc in to_datetime(arg, errors, dayfirst, utc, box) 106 107 try: --> 108 return _convert_f(arg) 109 except ValueError: 110 raise /usr/local/lib/python2.7/dist-packages/pandas-0.9.0rc2-py2.7-linux-x86_64.egg/pandas/tseries/tools.pyc in _convert_f(arg) 80 return DatetimeIndex._simple_new(values, None, tz=tz) 81 except (ValueError, TypeError): ---> 82 raise e 83 84 if arg is None: ValueError: Out of bounds nanosecond timestamp: 121001-01-01 00:00:00 ```
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7,362,770
MDExOlB1bGxSZXF1ZXN0MjU0ODg2Ng==
2,019
ENH: pivot_annual with a better exception message
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1
"2012-10-04T20:59:55Z"
"2012-11-24T08:21:52Z"
"2012-11-24T08:21:52Z"
CONTRIBUTOR
null
Without the extended message the user hardly understand why no integers are allowed. Actually, I do not even understand it by now. Can we not use _values.fill(np.nan)_ with integers?
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7,363,419
MDU6SXNzdWU3MzYzNDE5
2,020
ENH: add hourofyear to period
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2
"2012-10-04T21:25:32Z"
"2016-12-31T11:59:08Z"
"2016-12-29T11:12:14Z"
CONTRIBUTOR
null
Please add to https://github.com/pydata/pandas/blob/master/pandas/tseries/period.py - hourofyear BTW, How is it possible for user to add further convenience functions like: - minuteofday
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7,365,109
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2,021
Timestamp.dayofyear method returns day of month.
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2
"2012-10-04T22:40:03Z"
"2012-10-05T01:53:14Z"
"2012-10-05T01:53:14Z"
NONE
null
I noticed this while doing some work where I'm filtering values based on day of year: The dayofyear method of the Timestamp class returns the day of the month, not the day of the year. I realize there are a number of ways to compute this, none of which is very fast, but it could be changed to return the difference, in days, between it's own value and 0000 01 January of the current year. In pandas/src/datetime.pyx, the problematic code is, starting on line 147/148, in the definition of the function.
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BUG: reset_index fails with MultiIndex in columns #2017
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CONTRIBUTOR
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Multiple functions in GroupBy.apply/transform
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"2012-10-05T00:23:19Z"
"2014-03-09T15:21:30Z"
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1. Returns DataFrame for SeriesGroupBy.transform 2. Returns DataFrame with MultiIndexed columns for DataFrameGroupBy.transform 3. `chain` parameter to control whether transforms are applied in sequence or not
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"2012-10-05T09:33:52Z"
"2012-11-28T03:10:37Z"
"2012-11-28T03:07:50Z"
NONE
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``` import pandas as pd import numpy as np df = pd.DataFrame([(1,2,3), (4,5,6)], columns = ['a','b','c']) new_df = df.groupby(['a']).agg({'b': [np.mean, np.sum]}) other_df = df = pd.DataFrame([(1,2,3), (7,10,6)], columns = ['a','b','d']) other_df.set_index('a', inplace=True) print new_df print other_df pd.merge(new_df, other_df, left_index=True, right_index=True) --------------------------------------------------------------------------- TypeError Traceback (most recent call last) <ipython-input-11-4c9da13e85ff> in <module>() 7 print new_df 8 print other_df ----> 9 pd.merge(new_df, other_df, left_index=True, right_index=True) /usr/local/lib/python2.7/dist-packages/pandas-0.9.0rc2-py2.7-linux-x86_64.egg/pandas/tools/merge.pyc in merge(left, right, how, on, left_on, right_on, left_index, right_index, sort, suffixes, copy) 31 right_index=right_index, sort=sort, suffixes=suffixes, 32 copy=copy) ---> 33 return op.get_result() 34 if __debug__: merge.__doc__ = _merge_doc % '\nleft : DataFrame' 35 /usr/local/lib/python2.7/dist-packages/pandas-0.9.0rc2-py2.7-linux-x86_64.egg/pandas/tools/merge.pyc in get_result(self) 181 182 # this is a bit kludgy --> 183 ldata, rdata = self._get_merge_data() 184 185 # TODO: more efficiently handle group keys to avoid extra consolidation! /usr/local/lib/python2.7/dist-packages/pandas-0.9.0rc2-py2.7-linux-x86_64.egg/pandas/tools/merge.pyc in _get_merge_data(self) 271 lsuf, rsuf = self.suffixes 272 ldata, rdata = ldata._maybe_rename_join(rdata, lsuf, rsuf, --> 273 copydata=False) 274 return ldata, rdata 275 /usr/local/lib/python2.7/dist-packages/pandas-0.9.0rc2-py2.7-linux-x86_64.egg/pandas/core/internals.pyc in _maybe_rename_join(self, other, lsuffix, rsuffix, copydata) 1115 1116 def _maybe_rename_join(self, other, lsuffix, rsuffix, copydata=True): -> 1117 to_rename = self.items.intersection(other.items) 1118 if len(to_rename) > 0: 1119 if not lsuffix and not rsuffix: /usr/local/lib/python2.7/dist-packages/pandas-0.9.0rc2-py2.7-linux-x86_64.egg/pandas/core/index.pyc in intersection(self, other) 2270 Index 2271 """ -> 2272 self._assert_can_do_setop(other) 2273 2274 if self.equals(other): /usr/local/lib/python2.7/dist-packages/pandas-0.9.0rc2-py2.7-linux-x86_64.egg/pandas/core/index.pyc in _assert_can_do_setop(self, other) 2319 if len(other) == 0: 2320 return True -> 2321 raise TypeError('can only call with other hierarchical ' 2322 'index objects') 2323 TypeError: can only call with other hierarchical index objects b mean sum a 1 2 2 4 5 5 b d a 1 2 3 7 10 6 ``` also this fails ``` pd.merge(new_df.reset_index(), other_df.reset_index(), left_index=False, right_index=False, left_on =('a', ''), right_on ='a' ) ``` and this ``` pd.merge(new_df.reset_index(), other_df.reset_index(), left_index=False, right_index=False, left_on =[('a', '')], right_on =['a'] ) ```
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CONTRIBUTOR
null
Please see the example below: ``` python In [39]: df = pd.DataFrame({'a': np.arange(3)}, index=pd.date_range('2010-01-01', periods=3, freq='B')) In [40]: print df a 2010-01-01 0 2010-01-04 1 2010-01-05 2 In [41]: print df.to_html() <table border="1" class="dataframe"> <thead> <tr style="text-align: right;"> <th></th> <th>a</th> </tr> </thead> <tbody> <tr> <td><strong>1970-01-15 48:00:00</strong></td> <td> 0</td> </tr> <tr> <td><strong>1970-01-15 120:00:00</strong></td> <td> 1</td> </tr> <tr> <td><strong>1970-01-15 144:00:00</strong></td> <td> 2</td> </tr> </tbody> </table> In [42]: print pd.version.version 0.9.0.dev-a884949 In [43]: print np.version.version 1.6.1 In [44]: df.index.dtype Out[44]: dtype('datetime64[ns]') ```
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https://api.github.com/repos/pandas-dev/pandas/issues/2026
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7,379,753
MDU6SXNzdWU3Mzc5NzUz
2,026
Allow DataFrame.to_csv to represent inf and nan differently
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9
"2012-10-05T14:29:33Z"
"2012-12-07T15:16:57Z"
"2012-12-02T16:55:23Z"
CONTRIBUTOR
null
I would like the DataFrame.to_csv method to have an option to store inf values as "inf" and nan values as "nan". This will be important for computations that use inf and nan differently. Currently: In [72]: df = pd.DataFrame({'A': [inf]}) In [73]: print isinf(df) A 0 True In [74]: df.to_csv('temp.csv') In [75]: df2 = pd.read_csv('temp.csv', index_col=0) In [76]: print isinf(df2) A 0 False In the new implementation (possibly with an option passed to df.to_csv to select it), the result of isinf(df2) would be True.
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https://api.github.com/repos/pandas-dev/pandas/issues/2027
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7,380,349
MDU6SXNzdWU3MzgwMzQ5
2,027
Fillna with value & other arguments should raise exception
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3
"2012-10-05T14:51:19Z"
"2012-11-30T23:46:22Z"
"2012-11-30T23:46:22Z"
CONTRIBUTOR
null
``` In [1]: import pandas In [2]: import numpy as np In [3]: s = pandas.Series(range(10),dtype=np.float64) In [4]: s[3] = np.nan In [5]: s[6] = np.nan In [6]: s Out[6]: 0 0 1 1 2 2 3 NaN 4 4 5 5 6 NaN 7 7 8 8 9 9 ``` backfilling ok ``` In [8]: s.fillna(method='bfill') Out[8]: 0 0 1 1 2 2 3 4 4 4 5 5 6 7 7 7 8 8 9 9 ``` here the value argument takes precedence over the method argument (which is ignored) I propose that this should raise an exception("incompatible arguments to fillna, method is ignored?") this applies to Series,DataFrame,Panel ``` In [11]: s.fillna(value=0,method='bfill') Out[11]: 0 0 1 1 2 2 3 0 4 4 5 5 6 0 7 7 8 8 9 9 ```
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7,389,930
MDExOlB1bGxSZXF1ZXN0MjU2MjI2Nw==
2,028
Fix for EOF issue on c-parser branch
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1
"2012-10-05T21:19:44Z"
"2014-07-21T16:38:13Z"
"2012-10-29T18:07:48Z"
CONTRIBUTOR
null
Fix EOF issue on c-parser branch due to parser_handle_eof() not explicitely returning a value if state is START_RECORD. This results in the return value sometimes incorrectly set to -1 on Mac OS (seems to work okay on linux though). As a result, a parser exception is raised even though the file is read correctly. Patch returns 0 if parser state is START_RECORD, since that should mean that a line has just been finished being parsed correctly and it's at a valid end of the file. Also added a default return value of -1 if none of the other tests pass.
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https://api.github.com/repos/pandas-dev/pandas/issues/2029
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7,394,863
MDExOlB1bGxSZXF1ZXN0MjU2NDU2OQ==
2,029
(much) faster testing
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1
"2012-10-06T05:59:52Z"
"2012-10-12T23:41:02Z"
"2012-10-12T23:40:40Z"
NONE
null
after priming the cache, the extensions and cythoning will only recompile if files change. otherwise they are retrieved from the cache. the caching is disabled by default just in case it's buggy, but i've had no problems so far. with caching enabled and using tox_prll.shl it now takes 25 seconds to test all 2.x and about a minute and a half to test everything.
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https://api.github.com/repos/pandas-dev/pandas/issues/2030
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7,399,324
MDExOlB1bGxSZXF1ZXN0MjU2NjA0Mw==
2,030
Fix groupby.median documentation
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1
"2012-10-06T18:57:58Z"
"2014-07-19T02:19:40Z"
"2012-10-06T19:22:59Z"
CONTRIBUTOR
null
Minor oversight - looks like when the documentation was copied to median from mean the function name didn't get updated.
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7,400,645
MDU6SXNzdWU3NDAwNjQ1
2,031
pearson corr can throw IndexError
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3
"2012-10-06T21:33:59Z"
"2013-01-20T00:13:43Z"
"2013-01-20T00:13:43Z"
CONTRIBUTOR
null
I just got this from a ipython parallel run (so unfortunately no reproduceable case): ``` IndexError Traceback (most recent call last)<string>in <module>() C:\data\phd\montecarlo-paper\functions.py in simulate(inputs) C:\portabel\Python27\lib\site-packages\pandas\core\frame.pyc in corr(self, method) 3355 valid=mask[i]&mask[j] 3356 if not valid.all(): -> 3357 c=corrf(ac[valid],bc[valid]) 3358 else: 3359 c=corrf(ac,bc) C:\portabel\Python27\lib\site-packages\pandas\core\nanops.pyc in _pearson(a, b) 328 329 def _pearson(a,b): --> 330 return np.corrcoef(a,b)[0,1] 331 def _kendall(a,b): 332 return kendalltau(a,b)[0] IndexError: invalid index IndexError(invalid index) ``` (i had to do some S&R to get the stacktrace into this form, so hopefully I didn't reformat/remove anything) I'm not sure under which circumstance np.corrcoef does not return an array, but if so pandas should return "nan" in that case.
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https://api.github.com/repos/pandas-dev/pandas/issues/2032
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7,403,066
MDExOlB1bGxSZXF1ZXN0MjU2NzIxNQ==
2,032
fixed color keyword in time series plot - issue
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2
"2012-10-07T06:54:33Z"
"2014-07-08T12:28:44Z"
"2012-10-31T20:20:18Z"
CONTRIBUTOR
null
Fix 33bb84b was to series.plot not timeseries.plot. This is the same fix for timeseries.plot. Not sure why the def _maybe_add_color(kwargs, style, i) occurs in both _make_plot and _make_ts_plot? #1890
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7,404,224
MDU6SXNzdWU3NDA0MjI0
2,033
.ix does not warn when selecting a none-existing column
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5
"2012-10-07T11:40:41Z"
"2014-07-08T11:43:03Z"
"2013-12-18T20:09:34Z"
CONTRIBUTOR
null
``` df3 = DataFrame({"a":[1,2,3,4], "b":[1,2,3,4]}) df3.ix[:,["b","c"]] Out[1]: b c 0 1 NaN 1 2 NaN 2 3 NaN 3 4 NaN ``` I would have (had...) expected that the `df3.ix[:,["b","c"]]` will throw an error :-(
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7,404,641
MDU6SXNzdWU3NDA0NjQx
2,034
Default column names for `read_csv` and for data frames created from other data
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8
"2012-10-07T12:51:41Z"
"2012-12-09T19:13:19Z"
"2012-12-09T19:12:37Z"
NONE
null
If you read data from a file with `read_csv` the default column names of the resulting data frame are set to `X.1` to `X.N` (and to `X1` to `XN` for versions >= 0.9), which are strings. If you create a data frame from exiting arrays or lists or something the column names default to `0` to `N` and are integers. Should these default names be the same? I think this would be more consistent and would avoid confusion (Not sure how this is handled in `R` if this a part of this design decision). See also [this question](http://stackoverflow.com/q/12747417/1301710) and the answers on stackoverflow.
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7,405,937
MDU6SXNzdWU3NDA1OTM3
2,035
Need syntax sugar for dataframe row selection
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4
"2012-10-07T16:06:37Z"
"2013-12-16T15:10:28Z"
"2013-12-16T15:10:14Z"
NONE
null
Current dataframe row selection by columns is wordy , 'rowsl()' method is need to make it looks simple. def _rowsl(df, selection_str): #syntax sugar to simplify column selection: # df.rowsl('col_1>0.5 & col_2<40') act as # df[(df['col_1']>0.5) & (df['col_2']<40)] ``` #not_implement_yet #rst = parsing_and_ filtering return rst ``` DataFrame.rowsl = _rowsl
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7,409,100
MDExOlB1bGxSZXF1ZXN0MjU2OTAxNQ==
2,036
TST: DF should not error when 'columns' is a list that contains dupes
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"2012-10-07T22:40:56Z"
"2014-07-03T17:39:22Z"
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test_getitem_list_duplicates() shows that the same works for numpy arrays. > In [1]: DataFrame(data,columns=["a","a"]) > > ... > pandas/pandas/core/internals.pyc in _stack_dict(dct, ref_items, dtype) > 1344 stacked = np.empty(shape, dtype=dtype) > 1345 for i, item in enumerate(items): > -> 1346 stacked[i] = _asarray_compat(dct[item]) > 1347 > 1348 # stacked = np.vstack([_asarray_compat(dct[k]) for k in items]) > > IndexError: index out of bounds
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7,411,837
MDU6SXNzdWU3NDExODM3
2,037
Can speed of shift() improved ?
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4
"2012-10-08T04:53:20Z"
"2016-09-29T22:44:19Z"
"2016-09-29T22:36:55Z"
NONE
null
I cprofile my python code and found 'shift()' is one of the speed bottleneck. Then I do below test : In [27]: df = DataFrame(np.random.randn(50000, 10)) In [28]: timeit df.shift(1) 10 loops, best of 3: 19.7 ms per loop In [29]: df = DataFrame(np.random.randn(50000, 100)) In [30]: timeit df.shift(1) 1 loops, best of 3: 208 ms per loop I found the time spent on 'df.shift(1)' is in proportion to len(df.columns) . Can it be improved ? For all columns share same index, why not shift all columns in a batch (instead of one by one column ?)
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MDU6SXNzdWU3NDEyNzc3
2,038
DataFrame header is misaligned when column names contain tabs
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5
"2012-10-08T06:52:20Z"
"2012-11-17T03:53:27Z"
"2012-11-17T03:53:27Z"
NONE
null
Like it says in the title: ``` In [10]: pd.DataFrame([{"a\tb": 1, "c": 2}]) Out[10]: a b c 0 1 2 ```
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2,039
kde plots produce unexpected behavior with integers
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"2012-10-08T15:08:41Z"
"2012-10-09T14:09:21Z"
"2012-10-09T14:09:21Z"
NONE
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If we feed a series of integers into the kde plot the results are a horizontal line: ``` newy = pandas.Series([10,26,36,64,69,73,76,79,80,81,81,82,83,86,89,93,98,126,136,152]) newy.plot(kind='kde') ``` However, if the series is floats, instead of ints, things work as expected: ``` newy = pandas.Series([10.0,26,36,64,69,73,76,79,80,81,81,82,83,86,89,93,98,126,136,152]) newy.plot(kind='kde') ``` I originally noticed the behavior using `scatter_matrix(..., diagonal='kde')` which uses the same plotting engine, I presume.
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2,040
ENH: add arguments for scatter_plot
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2
"2012-10-08T16:28:49Z"
"2014-07-27T21:52:06Z"
"2013-07-29T05:09:11Z"
MEMBER
null
Modifies pandas/tools/plotting.py - xlim, ylim, sharex, sharey, xlabelsize and ylabelsize arguments are added - To handle the common arguments for axes decoration, _decorate_axes() function has been added (currently, only scatter_plot uses this function). - kwds argument added which is passed to ax.scatter() - Some test cases are added. This pull request should be merged to following pull request, but I've mistaken to merget the latest master branch. https://github.com/pydata/pandas/pull/1947
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read_csv treats both inf and -inf as very large negative number
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3
"2012-10-08T19:19:54Z"
"2012-11-01T14:31:52Z"
"2012-11-01T14:10:01Z"
CONTRIBUTOR
null
from [mailing list](https://groups.google.com/forum/#!topic/pydata/Wy3eBEnoDrM), same discussion led to #2026 ``` python In [42]: data = """\ ....: ,A ....: a,inf ....: b,-inf ....: """ In [43]: df = pd.read_csv(StringIO(data), index_col=0) In [44]: df Out[44]: A a -9223372036854775808 b -9223372036854775808 In [45]: df.dtypes Out[45]: A int64 ```
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MDU6SXNzdWU3NDMyMjg1
2,042
Dot doesn't accept arrays
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2
"2012-10-08T21:41:52Z"
"2012-10-31T21:02:21Z"
"2012-10-31T21:02:21Z"
NONE
null
``` In [93]: a = rand(1,5) In [94]: b = rand(5,1) In [95]: A = pd.DataFrame(a) In [96]: B = pd.DataFrame(b) In [97]: a.dot(b) Out[97]: array([[ 1.50425267]]) In [98]: A.dot(B) Out[98]: 0 0 1.504253 In [99]: a.dot(B) Out[99]: array([[ 1.50425267]]) In [100]: A.dot(b) --------------------------------------------------------------------------- AttributeError Traceback (most recent call last) D:\Projects\moc\<ipython-input-100-2a3d67ed3e0f> in <module>() ----> 1 A.dot(b) C:\Python27\lib\site-packages\pandas\core\frame.pyc in dot(self, other) 722 """ 723 lvals = self.values --> 724 rvals = other.values 725 result = np.dot(lvals, rvals) 726 return DataFrame(result, index=self.index, columns=other.columns) AttributeError: 'numpy.ndarray' object has no attribute 'values' ``` I would guess replace `rvals = other.values` with ``` try: rvals = other.values except AttributeError: pass ``` unless you specifically intended for this to fail? Thanks, Ludovic
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Merge doc still refers to Index uniqueness as requirement
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0
"2012-10-08T22:28:29Z"
"2012-11-02T14:22:33Z"
"2012-11-02T14:22:33Z"
CONTRIBUTOR
null
"Note that if using the index from either the left or right DataFrame (or both) using the left_index / right_index options, the join operation is no longer a many-to-many join by construction, as the index values are necessarily unique. There will be some examples of this below."
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filter_func parameter in DataFrame.update
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"2012-10-08T23:06:42Z"
"2012-11-16T01:58:38Z"
"2012-11-16T01:58:33Z"
CONTRIBUTOR
null
Right now it both isnull and filter_func are used to update. Probably should just replace isnull @jseabold any opinions?
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ordered_merge output out of order
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2
"2012-10-08T23:36:03Z"
"2012-11-19T01:45:18Z"
"2012-11-19T00:20:51Z"
CONTRIBUTOR
null
``` python In [31]: df1 Out[31]: date val 0 2012-01-01 00:00:00 -0.199984 1 2012-01-04 00:00:00 1.175552 2 2012-01-07 00:00:00 0.190748 3 2012-01-10 00:00:00 0.993547 4 2012-01-13 00:00:00 0.582836 In [32]: df2 Out[32]: date val 0 2012-01-02 00:00:00 0.701435 1 2012-01-05 00:00:00 0.825832 2 2012-01-08 00:00:00 0.298673 3 2012-01-11 00:00:00 1.554882 4 2012-01-14 00:00:00 0.990432 In [33]: pd.ordered_merge(df1, df2) Out[33]: date val 0 2012-01-13 00:00:00 0.582836 1 2012-01-14 00:00:00 0.990432 2 2012-01-04 00:00:00 1.175552 3 2012-01-05 00:00:00 0.825832 4 2012-01-07 00:00:00 0.190748 5 2012-01-08 00:00:00 0.298673 6 2012-01-10 00:00:00 0.993547 7 2012-01-11 00:00:00 1.554882 8 2012-01-01 00:00:00 -0.199984 9 2012-01-02 00:00:00 0.701435 ```
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Add nrows= and iterator= argument to ExcelFile.parse
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"2017-04-06T11:28:58Z"
"2014-05-29T03:00:42Z"
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These are very convenient for other parsers. This parser alone is lacking some features and documentation.
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2,047
DataFrame.iteritems bug for nonunique columns
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2
"2012-10-09T12:36:43Z"
"2012-11-18T18:54:52Z"
"2012-11-18T18:54:52Z"
CONTRIBUTOR
null
have two choices: 1. iterate over unique columns and returns self[col] 2. iterate over each column entry and return self.icol(i) #1 is better for a lot of current cases in using iteritems to reconstruct a dict. #2 seems more natural though. @wesm @lodagro any opinions?
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2,048
fix sql keywords in columns name bug
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1
"2012-10-09T16:05:11Z"
"2014-07-25T22:13:15Z"
"2012-11-18T21:16:55Z"
CONTRIBUTOR
null
the function `pandas.io.sql.write_frame` failed if keywords were used as column names in a DataFrame. i have added hard brackets to the column names as generated by the `get_sqlite_schema` function and created a test case in `test_sql.py`
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make github show link to developer guidelines when opening new issue/PR
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https://github.com/blog/1184-contributing-guidelines
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3
"2012-10-09T17:58:45Z"
"2014-06-20T15:11:02Z"
"2012-12-02T03:14:36Z"
CONTRIBUTOR
null
This branch makes inf/-inf different from nan/None (GH #1919), and also fixes a few bugs with INF and NaN values (GH #2026, #2041).
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7,474,110
MDU6SXNzdWU3NDc0MTEw
2,051
Series repr failure when name is tuple holding non-string type.
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0
"2012-10-10T07:46:56Z"
"2012-10-12T23:38:13Z"
"2012-10-12T23:36:01Z"
CONTRIBUTOR
null
``` python In [140]: s = pd.Series(list('abcd'), name=('foo', 1)) In [141]: s Out[141]: --------------------------------------------------------------------------- TypeError Traceback (most recent call last) ... .../pandas/core/format.pyc in _get_footer(self) 86 series_name = self.series.name 87 elif isinstance(self.series.name, tuple): ---> 88 series_name = "('%s')" % "', '".join(self.series.name) 89 else: 90 series_name = str(self.series.name) TypeError: sequence item 1: expected string, int found ``` Found the issue when indexing a MultiIndexed frame. ``` python In [142]: mi = pd.MultiIndex.from_tuples([('foo', 1), ('foo', 2)]) In [143]: df = pd.DataFrame(np.random.randn(2,2), index=mi) In [144]: df.ix[('foo', 1)] Out[144]: --------------------------------------------------------------------------- TypeError Traceback (most recent call last) ```
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7,486,523
MDExOlB1bGxSZXF1ZXN0MjYwMjY1MQ==
2,052
Added hourofyear for pivoting calcualtions
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9
"2012-10-10T15:37:19Z"
"2014-06-19T21:48:24Z"
"2013-07-29T05:17:57Z"
CONTRIBUTOR
null
I do not know if this is possible. But very much needed.
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7,490,907
MDU6SXNzdWU3NDkwOTA3
2,053
to_latex has no keyword force_unicode
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3
"2012-10-10T18:13:39Z"
"2013-02-19T22:02:18Z"
"2013-02-19T22:02:18Z"
CONTRIBUTOR
null
Don't have time to look into now. Not sure it really matters, but the docs state you can use the force_unicode option here but it's not an included keyword argument.
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Uncentered
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3
"2012-10-10T20:25:12Z"
"2014-02-16T21:55:28Z"
"2014-02-16T21:55:28Z"
CONTRIBUTOR
null
@wesm can I get a second pair of eyes to skim over this PR real quick? All tests pass but touches a lot of core modules.
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MDU6SXNzdWU3NTEzMDY3
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tests hang on Windows 7
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"2013-09-21T12:16:59Z"
"2013-09-21T12:16:59Z"
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OS: Windows 7 ``` $: git describe v0.7.0rc1-1778-g9d4f557 ``` ``` $: python Enthought Python Distribution -- www.enthought.com Version: 7.1-1 (32-bit) >>> import tables >>> tables.__version__ '2.4.0' >>> ``` ``` $: nosetests -v pandas ... test_verbose_import (pandas.io.tests.test_parsers.TestParsers) ... ok test_xlsx_table (pandas.io.tests.test_parsers.TestParsers) ... ok test_append (pandas.io.tests.test_pytables.TestHDFStore) ... ``` The tests then hang and the python process quits.
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7,519,107
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DOC: various small fixes
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MDU6SXNzdWU3NTIwMDk3
2,057
transform in groupby throws TypeError when run with python -O option
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4
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"2012-11-19T04:59:35Z"
"2012-11-19T04:59:35Z"
NONE
null
I have a script that works fine when run without any options but generates the following traceback when run with 'python -O': File "C:\Python27\lib\site-packages\pandas\core\groupby.py", line 1745, in transform return self._transform_item_by_item(obj, wrapper) File "C:\Python27\lib\site-packages\pandas\core\groupby.py", line 1777, in _transform_item_by_item raise TypeError('Transform function invalid for data types') TypeError: Transform function invalid for data types I have Python 2.7.3 and pandas 0.9.0: Python 2.7.3 (default, Apr 10 2012, 23:24:47) [MSC v.1500 64 bit (AMD64)] on win32 Type "help", "copyright", "credits" or "license" for more information. > > > import pandas > > > pandas.**version** > > > '0.9.0'
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Snap to convention in resampling
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1
"2012-10-11T18:07:28Z"
"2020-05-11T18:34:11Z"
"2020-05-11T18:34:10Z"
CONTRIBUTOR
null
if resampled index bin edges don't correspond to the original index, snap the starting data according to the specified convention http://stackoverflow.com/questions/12844900/upsampling-to-weekly-data-in-pandas
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BUG: fix Series repr when name is tuple holding non string-type
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6
"2012-10-11T19:07:25Z"
"2012-10-12T23:37:59Z"
"2012-10-12T06:56:57Z"
CONTRIBUTOR
null
Not sure if this is in line with latest unicode work, @y-p?
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"2012-11-02T16:46:21Z"
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MEMBER
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0
"2012-10-11T23:40:07Z"
"2012-11-01T14:19:31Z"
"2012-11-01T14:19:31Z"
MEMBER
null
CHAPTER 6 ESSENTIAL BASIC FUNCTIONALITY As the reader moves from section 6.1 to 6.2 to 6.3.1 The df variable does not trace through as the tutorial would expect. I think it needs to insert something like the following ``` In [14]: d = {'one': Series(randn(3), index=['a', 'b', 'c']),'two': Series(randn(4),index=['a','b','c','d']),'three': Series(randn(3), index=['b','c','d'])} df =DataFrame(d) ```
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4
"2012-10-12T14:38:04Z"
"2014-04-24T13:27:59Z"
"2014-04-24T12:01:25Z"
CONTRIBUTOR
null
I know how hard it can be to stick to conventions, but it might be nice to try to unify arguments that do similar things. For example, the argument to select/name columns is not consistent. I realize it's a bit difficult since columns usually means labels and there's an axis argument. I don't know to what extent it's feasible because of this, but maybe all of these should be column(s)? Or even name(s) since this doesn't imply an axis but can be inferred from context when there's no axis argument. The few that come to mind since I just used them. dropna -- subset drop_duplicates -- cols DataFrame -- columns Series -- name Just a thought.
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CLN: cleanup tox.ini, remove stale pandas/setup.py, fix tox warning
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1
"2012-10-12T17:08:38Z"
"2012-10-12T23:40:06Z"
"2012-10-12T23:39:58Z"
NONE
null
I always find it hard to get Packaging issues right, i'd appreciate if someone would back me up on pandas/setup.py being superfluous. I made sure that setup.py install/develop still works, and that introducing a failed test is caught by tox as you would expect, Also see #2029 for much faster tox runs.
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Drop If syntax
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6
"2012-10-12T19:19:11Z"
"2017-10-17T11:06:11Z"
"2017-10-17T11:06:11Z"
CONTRIBUTOR
null
Maybe there's already a way to do this, and there's certainly a safer and more robust/full-featured way to do this, but I just monkey-patched my DataFrames to have a dropif method because I got tired of typing. ``` def dropif(self, col, cond): return self.ix[~eval("self['%s']"%col +cond)] ``` In the spirit of Stata's drop and keep commands.
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Update pandas WLS centered_tss to match statsmodels
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"2012-11-01T00:23:39Z"
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MEMBER
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2,066
Fix for Python 3.3
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1
"2012-10-13T19:13:35Z"
"2014-07-15T12:12:35Z"
"2012-10-13T19:28:21Z"
CONTRIBUTOR
null
There were two problems with a simple 'import pandas' on python 3.3, that have to do with slots. For the first one, I converted the class initializer into an instance variable. For the second one, there seems to be a property to compute 'ndim' so I simply removed it. (I couldn't figure out quickly how to run the tests under Python 3; a number of problems are in the way.)
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MDU6SXNzdWU3NTc0MDUz
2,067
reindex fails on non-unique index
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0
"2012-10-14T14:48:53Z"
"2016-09-29T22:44:19Z"
"2016-09-29T22:37:12Z"
NONE
null
Since reindex and ix should behave the same way I guess since "Some might conclude that ix and reindex are 100% equivalent based on this. This is indeed true except in the case of integer indexing." The docstring also doesn't give any hint that one should use a unique index. ``` In [35]: import pandas as pd In [36]: df = pd.DataFrame([('a',2), ('a',3), ('b',4)], columns = ['A', 'B']) df2 = pd.DataFrame([('a',2), ('a',3), ('d',4)], columns = ['A', 'B']) df.set_index('A', inplace=True) df2.set_index('A', inplace=True) Out[36]: B A a 2 a 3 d 4 In [37]: df.ix[df.index.intersection(df2.index)] Out[37]: B A a 2 a 3 In [38]: df.reindex(df.index.intersection(df2.index)) --------------------------------------------------------------------------- Exception Traceback (most recent call last) <ipython-input-38-ad4829c75d14> in <module>() ----> 1 df.reindex(df.index.intersection(df2.index)) /usr/local/lib/python2.7/dist-packages/pandas-0.9.0-py2.7-linux-x86_64.egg/pandas/core/frame.pyc in reindex(self, index, columns, method, level, fill_value, limit, copy) 2244 if index is not None: 2245 frame = frame._reindex_index(index, method, copy, level, -> 2246 fill_value, limit) 2247 2248 return frame /usr/local/lib/python2.7/dist-packages/pandas-0.9.0-py2.7-linux-x86_64.egg/pandas/core/frame.pyc in _reindex_index(self, new_index, method, copy, level, fill_value, limit) 2320 limit=None): 2321 new_index, indexer = self.index.reindex(new_index, method, level, -> 2322 limit=limit) 2323 return self._reindex_with_indexers(new_index, indexer, None, None, 2324 copy, fill_value) /usr/local/lib/python2.7/dist-packages/pandas-0.9.0-py2.7-linux-x86_64.egg/pandas/core/index.pyc in reindex(self, target, method, level, limit) 825 else: 826 indexer = self.get_indexer(target, method=method, --> 827 limit=limit) 828 return target, indexer 829 /usr/local/lib/python2.7/dist-packages/pandas-0.9.0-py2.7-linux-x86_64.egg/pandas/core/index.pyc in get_indexer(self, target, method, limit) 746 747 if not self.is_unique: --> 748 raise Exception('Reindexing only valid with uniquely valued Index ' 749 'objects') 750 Exception: Reindexing only valid with uniquely valued Index objects ```
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Better prevent UnboundLocalError in DataFrame.apply
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"2012-10-14T19:08:42Z"
"2012-10-31T23:10:18Z"
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MEMBER
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cf. http://stackoverflow.com/questions/12608718/python-pandas-unbound-local-error-while-calling-a-function-df-apply
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MDU6SXNzdWU3NTc2OTgy
2,069
Floating point precision in DataFrame.to_csv
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"2012-10-14T19:23:06Z"
"2014-09-12T10:05:04Z"
"2013-09-21T12:28:14Z"
MEMBER
null
http://stackoverflow.com/questions/12877189/float64-with-pandas-to-csv What does R (or others) do?
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2,070
Cannot aggregate by mean when using PeriodIndex and high-frequency series does cross between bins
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"2013-01-21T17:17:58Z"
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When using a Series indexed by a PeriodIndex and downsampling, resampling fails when using how='mean' and where the series to be resampled does not span multiple lower-frequency bins. For example: ``` ix = period_range(start="2012-01-01", end="2012-12-31", freq="M") s = Series(np.random.randn(len(ix)), index=ix) s.resample("A", how='mean') ``` Fails because the period range is entirely contained within a single year. I've been able to replicate this going from quarterly to annual, or monthly to quarterly, etc. As of 0.9.1-dev, crashes Python without an exception as Cython function group_mean_bin() attempts to index into an empty bins array. ``` if bins[len(bins) - 1] == len(values): # Crash ``` I don't know how fine-grained pandas is right now when aggregating partially-filled periods, but it could be nice to have an option to return a NaN when the higher-frequency window is only partially filled. For example, suppose we sum daily to monthly and take a percent change across months, and either the recording started partway through the first month or data is only available partway through the last month. Then the first or last period percent change will possibly show a dramatic swing, and the user may not realize its simply an artifact of the data availability, as opposed to a truly interesting move in the underlying process. When running alot of automated aggregations the user may wish to not aggregate any partially filled periods in order to protect themselves from reaching a false conclusion about the time-series trend at the beginning or end of the series.
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c-parser branch: Iteration over an open file handle makes the parser fail
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8
"2012-10-15T09:23:44Z"
"2012-11-15T16:07:15Z"
"2012-11-15T15:46:12Z"
CONTRIBUTOR
null
An example is better than words: ``` python In [16]: cat test.txt AAA BBB CCC DDD EEE FFF GGG In [17]: with open("test.txt") as handle: iterator = itertools.islice(handle, 3) print list(iterator) res = pandas.read_table(handle, squeeze=True, header=None) ....: ['AAA\n', 'BBB\n', 'CCC\n'] In [18]: res Out[18]: Empty DataFrame Columns: array([], dtype=object) Index: array([], dtype=object) ``` This works with the python engine. Notice that the handle is not really iterated through: when debugging I noticed that after iterator usage, the handle keeps on staying at the same file line (IOW the parser is not iterating on it at all).
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DataFrame.ix selecting integer index not label index
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13
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"2013-03-22T20:06:10Z"
"2013-03-22T20:06:10Z"
CONTRIBUTOR
null
I recently was using **.ix** on a DataFrame with an index that is very close to the integer index and got some unexpected results: http://nbviewer.ipython.org/3882591/wonky-indexes.ipynb I'm not sure if this is a bug or if I'm misreading the docs.
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Up-sampling and filling while also passing the "how" parameter
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0
"2012-10-15T18:34:12Z"
"2014-06-04T19:47:32Z"
"2014-06-04T19:47:32Z"
CONTRIBUTOR
null
I'm up-sampling quarterly data to monthly periods and using a fill method which is working fine, but then when I pass in an argument for "how", it seems to disable the filling feature. My understanding was that "how" doesn't mean anything in the context of up-sampling, in which case I would expect passing the parameter to have no effect on the output. Is this a bug or am I missing something about how this is supposed to work? See below (pandas 0.8.1): ``` In [18]: s = pandas.Series(range(9), index=pandas.date_range('2010-01-01', periods=9, freq='Q')) In [19]: s Out[19]: 2010-03-31 0 2010-06-30 1 2010-09-30 2 2010-12-31 3 2011-03-31 4 2011-06-30 5 2011-09-30 6 2011-12-31 7 2012-03-31 8 Freq: Q-DEC In [20]: s.resample('M', fill_method='ffill') Out[20]: 2010-03-31 0 2010-04-30 0 2010-05-31 0 2010-06-30 1 2010-07-31 1 2010-08-31 1 2010-09-30 2 2010-10-31 2 2010-11-30 2 2010-12-31 3 2011-01-31 3 2011-02-28 3 2011-03-31 4 2011-04-30 4 2011-05-31 4 2011-06-30 5 2011-07-31 5 2011-08-31 5 2011-09-30 6 2011-10-31 6 2011-11-30 6 2011-12-31 7 2012-01-31 7 2012-02-29 7 2012-03-31 8 Freq: M In [21]: s.resample('M', fill_method='ffill', how='last') Out[21]: 2010-03-31 0 2010-04-30 NaN 2010-05-31 NaN 2010-06-30 1 2010-07-31 NaN 2010-08-31 NaN 2010-09-30 2 2010-10-31 NaN 2010-11-30 NaN 2010-12-31 3 2011-01-31 NaN 2011-02-28 NaN 2011-03-31 4 2011-04-30 NaN 2011-05-31 NaN 2011-06-30 5 2011-07-31 NaN 2011-08-31 NaN 2011-09-30 6 2011-10-31 NaN 2011-11-30 NaN 2011-12-31 7 2012-01-31 NaN 2012-02-29 NaN 2012-03-31 8 Freq: M ```
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Problem with Series.str.match
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9
"2012-10-15T20:21:49Z"
"2014-05-29T07:42:03Z"
"2014-05-29T07:42:03Z"
CONTRIBUTOR
null
Not sure yet what's going on here. Doesn't appear to be a unicode issue ``` df = pandas.DataFrame([[u'A Confe\xdfion of the most auncient and true christen catholike olde belefe accordyng to the ordre of the .XII. Articles of our co[m]mon crede, set furthe in Englishe to the glory of almightye God, and to the confirmacion of Christes people in Christes catholike olde faith.']], columns=["title"]) df.title.str.match(".*[A|a]lmight") # returns #0 () #Name: title re.match(".*[A|a]lmight", df.title.ix[0]) # expected output #<_sre.SRE_Match at 0x4fa8100> ```
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Panel constructed with a None as a dict value throws an error
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2
"2012-10-16T02:42:36Z"
"2014-06-18T19:13:57Z"
"2012-11-02T20:48:38Z"
CONTRIBUTOR
null
Python 2.7.3 (default, Jun 21 2012, 07:50:29) [GCC 4.4.5] on linux2 Type "help", "copyright", "credits" or "license" for more information. > > > import pandas > > > print pandas.**version** > > > 0.8.1 > > > print pandas.Panel(dict(a = None, b = pandas.DataFrame(index=[1,2,3],columns=[1,2,3]))) > > > Traceback (most recent call last): > > > File "<stdin>", line 1, in <module> > > > File "/usr/local/lib/python2.7/site-packages/pandas-0.8.1-py2.7-linux-x86_64.egg/pandas/core/panel.py", line 219, in **init** > > > mgr = self._init_dict(data, passed_axes, dtype=dtype) > > > File "/usr/local/lib/python2.7/site-packages/pandas-0.8.1-py2.7-linux-x86_64.egg/pandas/core/panel.py", line 256, in _init_dict > > > major = _extract_axis(data, axis=0) > > > File "/usr/local/lib/python2.7/site-packages/pandas-0.8.1-py2.7-linux-x86_64.egg/pandas/core/panel.py", line 1396, in _extract_axis > > > raw_lengths.append(v.shape[axis]) > > > AttributeError: 'NoneType' object has no attribute 'shape' same behavior exists in 0.9 added tests and fixes for this case (and the pathological case of constructing with dict(a=None))
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feature request: displaying lots of columns
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8
"2012-10-16T13:06:49Z"
"2012-12-12T15:53:39Z"
"2012-12-11T14:48:51Z"
NONE
null
Hi, What's the plan for displaying head() cleanly on my dataframe when there are lots of columns? R handle's this easily by wrapping the output across multiple lines. Thanks, Vishal
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reindex raises AssertError after prior reindex
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4
"2012-10-16T17:05:12Z"
"2012-11-02T17:03:25Z"
"2012-11-02T16:47:12Z"
CONTRIBUTOR
null
``` In [1]: import pandas In [2]: import numpy as np In [3]: index = pandas.date_range('1/1/2000', periods=8,) In [4]: p = pandas.Panel(np.random.randn(2, len(index), 4), items=['Item1', 'Item2'], major_axis=index, minor_axis=['A', 'B', 'C', 'D']) In [5]: p Out[5]: <class 'pandas.core.panel.Panel'> Dimensions: 2 (items) x 8 (major) x 4 (minor) Items: Item1 to Item2 Major axis: 2000-01-01 00:00:00 to 2000-01-08 00:00:00 Minor axis: A to D In [7]: x = p.reindex(items = ['Item1','Item2'], copy = False) In [8]: x.reindex(minor = ['A','B']) Out[8]: <class 'pandas.core.panel.Panel'> Dimensions: 2 (items) x 8 (major) x 2 (minor) Items: Item1 to Item2 Major axis: 2000-01-01 00:00:00 to 2000-01-08 00:00:00 Minor axis: A to B ``` This fails on a comparison in the internals.Block integrity_check of: block.ref_items is self.items they are in fact equal (e.g. ==), but id(block.ref_items) != id(self.items) and hence the is fails since I first reindex on an index which is considered equal, you just return the index directly (rather than create a new one as in an reindex where its not equal), then on the second reindex the block manager thinks items has changed (to what the block sees), but its actually the other index I guess you could copy on an equals index, but not entirely sure this will solve the problem This is an odd and probably pathological case where I pre-reindexed some panels (on items), then reindexed another axis later - passing copy = False on the reindex where there is the potential for an indentical index being passed is a work-around ``` In [10]: x = p.reindex(items = ['Item1','Item2']) In [11]: x.reindex(minor = ['A','B']) --------------------------------------------------------------------------- AssertionError Traceback (most recent call last) <ipython-input-11-5f7bfc09b93d> in <module>() ----> 1 x.reindex(minor = ['A','B']) /usr/local/lib/python2.7/site-packages/pandas-0.8.1-py2.7-linux-x86_64.egg/pandas/core/panel.pyc in reindex(self, major, items, minor, method, major_axis, minor_axis, copy) 691 692 if minor is not None: --> 693 result = result._reindex_axis(minor, method, 2, copy) 694 695 if items is not None: /usr/local/lib/python2.7/site-packages/pandas-0.8.1-py2.7-linux-x86_64.egg/pandas/core/generic.pyc in _reindex_axis(self, new_index, fill_method, axis, copy) 589 def _reindex_axis(self, new_index, fill_method, axis, copy): 590 new_data = self._data.reindex_axis(new_index, axis=axis, --> 591 method=fill_method, copy=copy) 592 593 if new_data is self._data and not copy: /usr/local/lib/python2.7/site-packages/pandas-0.8.1-py2.7-linux-x86_64.egg/pandas/core/internals.pyc in reindex_axis(self, new_axis, method, axis, copy) 959 960 new_axis, indexer = cur_axis.reindex(new_axis, method) --> 961 return self.reindex_indexer(new_axis, indexer, axis=axis) 962 963 def reindex_indexer(self, new_axis, indexer, axis=1, fill_value=np.nan): /usr/local/lib/python2.7/site-packages/pandas-0.8.1-py2.7-linux-x86_64.egg/pandas/core/internals.pyc in reindex_indexer(self, new_axis, indexer, axis, fill_value) 981 new_axes = list(self.axes) 982 new_axes[axis] = new_axis --> 983 return BlockManager(new_blocks, new_axes) 984 985 def _reindex_indexer_items(self, new_items, indexer, fill_value): /usr/local/lib/python2.7/site-packages/pandas-0.8.1-py2.7-linux-x86_64.egg/pandas/core/internals.pyc in __init__(self, blocks, axes, do_integrity_check) 491 /usr/local/lib/python2.7/site-packages/pandas-0.8.1-py2.7-linux-x86_64.egg/pandas/core/internals.pyc in _verify_integrity(self) 572 mgr_shape = self.shape 573 for block in self.blocks: --> 574 assert(block.ref_items is self.items) 575 assert(block.values.shape[1:] == mgr_shape[1:]) 576 tot_items = sum(len(x.items) for x in self.blocks) AssertionError: ```
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"greater than" comparison method of doesn't perform as expected on Micro objects
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0
"2012-10-16T21:15:38Z"
"2012-11-02T21:55:14Z"
"2012-11-02T21:55:14Z"
MEMBER
null
Using IPython: ``` python In [1]: import pandas In [2]: Micro = pandas.datetools.Micro In [3]: 3 * Micro() > 2 * Micro() Out[3]: False In [4]: 2 * Micro() > 3 * Micro() Out[4]: False ``` They can't both be `False`. Giving the arguments to `>` to `cmp` works as expected. Not sure where the issue lies since neither `Micro` nor any of its superclasses implements any of the comparison methods except `__eq__` and `__ne__`.
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2,079
BUG: df fails when columns arg is a list containing dupes
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4
"2012-10-17T05:41:41Z"
"2012-11-05T16:56:02Z"
"2012-11-05T16:56:02Z"
NONE
null
``` In [1]: DataFrame(data,columns=["a","a"]) ... pandas/pandas/core/internals.pyc in _stack_dict(dct, ref_items, dtype) 1344 stacked = np.empty(shape, dtype=dtype) 1345 for i, item in enumerate(items): -> 1346 stacked[i] = _asarray_compat(dct[item]) 1347 1348 # stacked = np.vstack([_asarray_compat(dct[k]) for k in items]) IndexError: index out of bounds ``` 5e6db32e is a failing test for this. it looks like `_to_sdict` threads down to a call to `_convert_object_array` which builds a dict keyed on column names, so dupe columns get squashed and you end up with a mismatch between the length of the `columns` arg to `df.__init__` and the data. _to_sdict is not used for ndarrays so this doesn't haoppen, I was able to reuse `_init_ndarray` for the case of `columns` being a flat list and have things work as expected. still, too much code touching this, better left to the core devs to decide how to handle this.
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pandas.tests.test_graphics error
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1
"2012-10-17T13:21:27Z"
"2012-10-31T20:24:29Z"
"2012-10-31T20:24:29Z"
CONTRIBUTOR
null
When running nosetests on master i get one error. This occurs when plotting a dataframe with multiindex holding unicode. It must be related to my environment since the [travis build](https://travis-ci.org/#!/pydata/pandas/jobs/2795124) passes. python 2.7 numpy 1.6.2 matplotlib 1.1.0 (backend: Qt4Agg) ``` python ====================================================================== ERROR: test_plot (pandas.tests.test_graphics.TestDataFramePlots) ---------------------------------------------------------------------- Traceback (most recent call last): File "<...>/pandas/tests/test_graphics.py", line 207, in test_plot _check_plot_works(df.plot, title=u'\u03A3') <...> <...>/lib/python2.7/site-packages/matplotlib/cbook.py", line 1832, in is_math_text "matplotlib display text must have all code points < 128 or use Unicode strings") ValueError: matplotlib display text must have all code points < 128 or use Unicode strings ```
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2
"2012-10-19T01:04:08Z"
"2012-12-11T05:57:05Z"
"2012-12-11T05:57:05Z"
NONE
null
I'm working on the next Unicode PR, which incorporates some global configurables, and I can't seem to find a convention for handling that uniformly in pandas. format.py has `_GlobalPrintConfig`/`print_config`, and core.api has the corresponding `set_printoptions`, It looks to me like they need to be integrated into something more general. Examples from other projects: - `matplotlib` has rcParams - `IPython` does things differently with [config.configurable](http://ipython.org/ipython-doc/stable/api/generated/IPython.config.configurable.html) , but still has a well defined way of using/adding configurables. I suggest a new `core.config` module to hold all configurables, It will take over print_config (set_printoptions will keep working), but will provide a more general namespacing scheme for configurables along with a getter/setter to be added to core.api. Once the getter/setter convention is put into place and used uniformly in the code, the underlying implementation can change as necessary when pandas grows. if this sounds reasonable, I can follow up with a PR. @wesm?
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2,082
bar plot color cycle
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0
"2012-10-19T13:22:18Z"
"2012-11-03T16:23:01Z"
"2012-11-03T16:23:01Z"
CONTRIBUTOR
null
for line graph `style` correctly sets color cycle for bar/barh `color` does. Need to make both work for both
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min/max on datetime64-dtype Series should yield Timestamp
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0
"2012-10-19T14:45:21Z"
"2012-11-01T00:10:29Z"
"2012-11-01T00:10:29Z"
MEMBER
null
xref: http://stackoverflow.com/questions/12974404/unexpected-results-of-min-and-max-methods-of-pandas-series-made-of-timestamp
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parsing data from .csv or .txt
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2
"2012-10-19T16:46:14Z"
"2012-10-20T15:14:36Z"
"2012-10-20T15:14:36Z"
NONE
null
when I type this lines everything works fine: #72 hours starting with midnight Jan 1st, 2011 rng = date_range(’1/1/2011’, periods=72, freq=’H’) but when I type this rng = date_range('date.txt', periods=72, freq='H') unable to parse date.txt
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2,085
incorporate user defined offsets as aliases
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1
"2012-10-19T17:33:03Z"
"2014-02-18T20:25:01Z"
"2014-02-18T20:25:01Z"
CONTRIBUTOR
null
http://stackoverflow.com/questions/12979062/using-a-custom-offset-alias-in-pandas I'm thinking: @offset_alias class CustomOffset(DateOffset): ...
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STY: pep8
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3
"2012-10-19T21:57:12Z"
"2012-10-31T20:27:52Z"
"2012-10-31T20:27:52Z"
CONTRIBUTOR
null
Except for test_\* files i ran every file through pep8, and resolved most of the violations.
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7,737,265
MDU6SXNzdWU3NzM3MjY1
2,087
Series.diff() not exact for huge numbers: approximation or mistake?
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1
"2012-10-20T12:33:17Z"
"2016-10-12T23:03:16Z"
"2012-11-04T23:03:17Z"
NONE
null
Series.diff() is not exact for huge numbers. This might be due to some quick approximation or just a bug/mistake. In [40]: a = 10000000000000000 In [41]: log10(a) Out[41]: 16.0 In [42]: b = a + 1 In [43]: s = Series([a,b]) In [44]: s.diff() Out[44]: 0 NaN 1 0 numpy.diff() is not to blame: In [45]: v = s.values In [46]: v Out[46]: array([10000000000000000, 10000000000000001], dtype=int64) In [47]: diff(v) Out[47]: array([1], dtype=int64) One less digit is fine: In [48]: a = 1000000000000000 In [48]: log10(a) Out[48]: 15.0 In [49]: b = a + 1 In [50]: s = Series([a,b]) In [51]: s.diff() Out[51]: 0 NaN 1 1 Why do I need these huge numbers? Certain timestamps (in my case VMS) have this many digits (tenth of microseconds since the year 1858 if I remember correctly).
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7,737,987
MDU6SXNzdWU3NzM3OTg3
2,088
Feature request: hierarchical axes labels on bar charts
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1
"2012-10-20T14:21:51Z"
"2019-12-23T04:12:12Z"
null
NONE
null
Related to matplotlib/matplotlib#1257. This is a feature available in Excel and [OpenOffice 3.3](http://www.openoffice.org/dev_docs/features/3.3/#Hierarchical_Axis_Labels_for_Charts). Example: ![http://i.imgur.com/8SjMs.png](http://i.imgur.com/8SjMs.png) I think there may be a simple way to do it with matplotlib's [table](http://matplotlib.org/users/screenshots.html#table-demo) to construct the hierarchical axes labels. I'm not an expert in matplotlib or pandas, but I've cobbled together a small demo: ``` import itertools import numpy as np import pandas as pd import matplotlib.pyplot as plt row_labels = itertools.product(['ASub', 'DSub'], ['LD', 'LS'], ['GD', 'GS'], ['Attn', 'Dist']) midx = pd.MultiIndex.from_tuples([row for row in row_labels], names=['Group', 'Local', 'Global', 'Attn']) df = pd.DataFrame({'mean': np.random.rand(16)}, index=midx) ax = df.plot(kind='bar') ax.xaxis.set_visible(False) cell_text = np.array(df.index.tolist()).T ax.table(cellText=cell_text, rowLabels=df.index.names, cellLoc = 'center') plt.subplots_adjust(bottom=0.2) plt.show() ``` Produces the plot ![http://i.imgur.com/OB8wi.png](http://i.imgur.com/OB8wi.png) There's probably a smarter way to populate the table in order to place the labels at the center of the merged cells as well as fix the spacing clashes.
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7,738,290
MDU6SXNzdWU3NzM4Mjkw
2,089
Make frequency string alias codes extensible by the user
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"2012-10-20T14:57:33Z"
"2012-10-20T15:41:50Z"
"2012-10-20T15:41:50Z"
MEMBER
null
cf http://stackoverflow.com/questions/12979062/using-a-custom-offset-alias-in-pandas
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7,738,657
MDU6SXNzdWU3NzM4NjU3
2,090
Parser unit test
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0
"2012-10-20T15:41:16Z"
"2012-11-17T21:31:20Z"
"2012-11-17T21:31:20Z"
MEMBER
null
This needs (problem and solution) to be converted to a unit test somewhere. Perhaps wait until c-parser branch has been merged into mainline to avoid merging unpleasantness. http://stackoverflow.com/questions/12947521/python-pandas-mixed-boolean-yes-true-and-nan-columns
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MDU6SXNzdWU3NzM5MDU0
2,091
Minor issues with ISO8601 shortcuts in time series
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2
"2012-10-20T16:24:24Z"
"2013-04-01T12:16:53Z"
"2013-04-01T12:16:53Z"
MEMBER
null
I've seen this too: http://stackoverflow.com/questions/12910187/pandas-dataframe-slicing-by-day-hour-minute
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7,739,683
MDU6SXNzdWU3NzM5Njgz
2,092
Null SQL Values in Frame Query causing TypeError
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2
"2012-10-20T17:35:57Z"
"2012-11-01T20:13:34Z"
"2012-11-01T20:13:34Z"
NONE
null
When I execute a io.sql.frame_query, and the one of the rows in a sql data column (just ints) is Null (SQL Server using FreeTDS), I get a type error when one of the frame functions tries to get the length of a NoneType object. The reason I suspect it is due to a Null value is because when I change the query to be top X it works fine, until X includes a row that has a NULL Value Traceback (most recent call last): File "/Users/kbrandt/src/Orionpy/test_script.py", line 4, in <module> ny_web01.applications.Socket_Server.components.SocketServer_exe.get_data() File "/Users/kbrandt/src/Orionpy/orion.py", line 159, in get_data Component.get_data(self, query_string, time_win) File "/Users/kbrandt/src/Orionpy/orion.py", line 144, in get_data self.data = psql.frame_query(query, self.node._connection) File "/Library/Python/2.7/site-packages/pandas/io/sql.py", line 146, in read_frame coerce_float=coerce_float) File "/Library/Python/2.7/site-packages/pandas/core/frame.py", line 846, in from_records coerce_float=coerce_float) File "/Library/Python/2.7/site-packages/pandas/core/frame.py", line 4957, in _to_sdict if len(data) == 0 or not data: TypeError: object of type 'NoneType' has no len() [Finished in 2.8s with exit code 1]
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7,740,464
MDU6SXNzdWU3NzQwNDY0
2,093
Look into bench script failure
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0
"2012-10-20T19:18:02Z"
"2012-11-03T18:50:15Z"
"2012-11-03T18:50:15Z"
MEMBER
null
per http://wesmckinney.com/blog/?p=414#comment-676452789 . Putting this here rather than sit in my inbox
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2,094
Sorting by column, API improvements possible with SO example?
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1
"2012-10-20T19:44:34Z"
"2014-09-11T00:49:44Z"
"2014-01-29T21:22:10Z"
MEMBER
null
cookie crumbs, in case there's anything to learn here: http://stackoverflow.com/questions/12641606/pandas-sorting-numbers-within-text-by-column
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Incorrect handling of datetime64 values in structured arrays
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8
"2012-10-20T20:19:49Z"
"2012-12-06T23:39:11Z"
"2012-11-01T14:00:10Z"
MEMBER
null
see: ``` arr = np.array([ (datetime.datetime(2012, 9, 9, 0, 0), datetime.datetime(2012, 9, 8, 15, 10))], dtype=[('Date', '<M8[us]'), ('Forecasting', '<M8[us]')]) DataFrame(arr) ``` cf http://stackoverflow.com/questions/12369546/pandas-parsing-datetime-column-from-sqlite-database
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Bug with boolean indexing on empty DataFrame
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1
"2012-10-20T20:23:37Z"
"2012-11-02T23:06:06Z"
"2012-11-02T23:06:06Z"
MEMBER
null
xref http://stackoverflow.com/questions/12700251/pandas-edge-case-on-boolean-index-into-empty-dataframe ``` blah = pandas.DataFrame(numpy.empty([0, 1]), columns=['A'], index=pandas.DatetimeIndex([])) blah[numpy.array([], bool)] ``` Empty DataFrame ``` blah[numpy.array([], bool)] = 0.0 ```
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PR: adding a core.config module to hold package-wide configurables
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15
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"2014-06-13T09:21:50Z"
"2012-11-27T22:19:28Z"
NONE
null
PR for #2081 ## Summary - core.config is a new module which serves as a general mechanism for working with configurables. - superceds fmt.print_config, while remaining backward-compatible (set_printoptions(), reset_printoptions() are still working). - adds the following user API's: `get_option()`, `set_option`, `reset_option()`, `reset_options()` and `describe_option()` (all under the pandas top level module). - adds the following for developer use: `register_option()` and `deprecate_option()`. ## TL;DR description ``` ENH: Add core.config module for managing package-wide configurables The config module holds package-wide configurables and provides a uniform API for working with them. Overview ======== This module supports the following requirements: - options are referenced using keys in dot.notation, e.g. "x.y.option - z". - options can be registered by modules at import time. - options can be registered at init-time (via core.config_init) - options have a default value, and (optionally) a description and validation function associated with them. - options can be deprecated, in which case referencing them should produce a warning. - deprecated options can optionally be rerouted to a replacement so that accessing a deprecated option reroutes to a differently named option. - options can be reset to their default value. - all option can be reset to their default value at once. - all options in a certain sub - namespace can be reset at once. - the user can set / get / reset or ask for the description of an option. - a developer can register and mark an option as deprecated. Implementation ============== - Data is stored using nested dictionaries, and should be accessed through the provided API. - "Registered options" and "Deprecated options" have metadata associcated with them, which are stored in auxilary dictionaries keyed on the fully-qualified key, e.g. "x.y.z.option". - the config_init module is imported by the package's __init__.py file. placing any register_option() calls there will ensure those options are available as soon as pandas is loaded. If you use register_option in a module, it will only be available after that module is imported, which you should be aware of. - `config_prefix` is a context_manager (for use with the `with` keyword) which can save developers some typing, see the docstring. ```
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7,753,680
MDU6SXNzdWU3NzUzNjgw
2,098
merging on dates ignores sort keyword
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4
"2012-10-21T23:09:13Z"
"2013-09-21T13:03:39Z"
"2013-09-21T13:03:39Z"
CONTRIBUTOR
null
``` import pandas import numpy as np from datetime import datetime d = {"var1" : np.random.randint(0, 10, size=10), "var2" : np.random.randint(0, 10, size=10), "var3" : [datetime(2012, 1, 12), datetime(2011, 2, 4), datetime(2010, 2, 3), datetime(2012, 1, 12), datetime(2011, 2, 4), datetime(2012, 4, 3), datetime(2012, 3, 4), datetime(2008, 5, 1), datetime(2010, 2, 3), datetime(2012, 2, 3)]} df = pandas.DataFrame.from_dict(d) df.ix[:7] var3 = df.var3.unique() var3.sort() new = pandas.DataFrame.from_dict({"var3" : var3, "var8" : np.random.random(7)}) df.merge(new, on="var3", sort=False).ix[:7] ```
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MDU6SXNzdWU3NzUzOTE3
2,099
Option to exclude certain columns for plotting
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2
"2012-10-21T23:37:58Z"
"2016-09-29T22:44:19Z"
"2016-09-29T22:37:35Z"
CONTRIBUTOR
null
Also maybe auto-exclude non-numerical columns by default like groupby agg? http://stackoverflow.com/questions/13003051/how-do-i-exclude-a-few-columns-from-a-dataframe-plot
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2,100
Odd unstack failure
{ "avatar_url": "https://avatars.githubusercontent.com/u/329591?v=4", "events_url": "https://api.github.com/users/wesm/events{/privacy}", "followers_url": "https://api.github.com/users/wesm/followers", "following_url": "https://api.github.com/users/wesm/following{/other_user}", "gists_url": "https://api.github.com/users/wesm/gists{/gist_id}", "gravatar_id": "", "html_url": "https://github.com/wesm", "id": 329591, "login": "wesm", "node_id": "MDQ6VXNlcjMyOTU5MQ==", "organizations_url": "https://api.github.com/users/wesm/orgs", "received_events_url": "https://api.github.com/users/wesm/received_events", "repos_url": "https://api.github.com/users/wesm/repos", "site_admin": false, "starred_url": "https://api.github.com/users/wesm/starred{/owner}{/repo}", "subscriptions_url": "https://api.github.com/users/wesm/subscriptions", "type": "User", "url": "https://api.github.com/users/wesm" }
[ { "color": "e10c02", "default": false, "description": null, "id": 76811, "name": "Bug", "node_id": "MDU6TGFiZWw3NjgxMQ==", "url": "https://api.github.com/repos/pandas-dev/pandas/labels/Bug" } ]
closed
false
{ "avatar_url": "https://avatars.githubusercontent.com/u/329591?v=4", "events_url": "https://api.github.com/users/wesm/events{/privacy}", "followers_url": "https://api.github.com/users/wesm/followers", "following_url": "https://api.github.com/users/wesm/following{/other_user}", "gists_url": "https://api.github.com/users/wesm/gists{/gist_id}", "gravatar_id": "", "html_url": "https://github.com/wesm", "id": 329591, "login": "wesm", "node_id": "MDQ6VXNlcjMyOTU5MQ==", "organizations_url": "https://api.github.com/users/wesm/orgs", "received_events_url": "https://api.github.com/users/wesm/received_events", "repos_url": "https://api.github.com/users/wesm/repos", "site_admin": false, "starred_url": "https://api.github.com/users/wesm/starred{/owner}{/repo}", "subscriptions_url": "https://api.github.com/users/wesm/subscriptions", "type": "User", "url": "https://api.github.com/users/wesm" }
[ { "avatar_url": "https://avatars.githubusercontent.com/u/329591?v=4", "events_url": "https://api.github.com/users/wesm/events{/privacy}", "followers_url": "https://api.github.com/users/wesm/followers", "following_url": "https://api.github.com/users/wesm/following{/other_user}", "gists_url": "https://api.github.com/users/wesm/gists{/gist_id}", "gravatar_id": "", "html_url": "https://github.com/wesm", "id": 329591, "login": "wesm", "node_id": "MDQ6VXNlcjMyOTU5MQ==", "organizations_url": "https://api.github.com/users/wesm/orgs", "received_events_url": "https://api.github.com/users/wesm/received_events", "repos_url": "https://api.github.com/users/wesm/repos", "site_admin": false, "starred_url": "https://api.github.com/users/wesm/starred{/owner}{/repo}", "subscriptions_url": "https://api.github.com/users/wesm/subscriptions", "type": "User", "url": "https://api.github.com/users/wesm" } ]
{ "closed_at": "2012-11-18T18:54:52Z", "closed_issues": 130, "created_at": "2012-10-11T19:38:39Z", "creator": { "avatar_url": "https://avatars.githubusercontent.com/u/329591?v=4", "events_url": "https://api.github.com/users/wesm/events{/privacy}", "followers_url": "https://api.github.com/users/wesm/followers", "following_url": "https://api.github.com/users/wesm/following{/other_user}", "gists_url": "https://api.github.com/users/wesm/gists{/gist_id}", "gravatar_id": "", "html_url": "https://github.com/wesm", "id": 329591, "login": "wesm", "node_id": "MDQ6VXNlcjMyOTU5MQ==", "organizations_url": "https://api.github.com/users/wesm/orgs", "received_events_url": "https://api.github.com/users/wesm/received_events", "repos_url": "https://api.github.com/users/wesm/repos", "site_admin": false, "starred_url": "https://api.github.com/users/wesm/starred{/owner}{/repo}", "subscriptions_url": "https://api.github.com/users/wesm/subscriptions", "type": "User", "url": "https://api.github.com/users/wesm" }, "description": "", "due_on": "2012-10-27T07:00:00Z", "html_url": "https://github.com/pandas-dev/pandas/milestone/17", "id": 194158, "labels_url": "https://api.github.com/repos/pandas-dev/pandas/milestones/17/labels", "node_id": "MDk6TWlsZXN0b25lMTk0MTU4", "number": 17, "open_issues": 0, "state": "closed", "title": "0.9.1", "updated_at": "2012-11-19T16:07:57Z", "url": "https://api.github.com/repos/pandas-dev/pandas/milestones/17" }
0
"2012-10-22T00:32:03Z"
"2012-11-01T00:20:38Z"
"2012-11-01T00:20:38Z"
MEMBER
null
Set day,time, smoker as index, unstack(2) ``` day,time,smoker,sum,len Fri,Dinner,No,8.25,3 Fri,Dinner,Yes,27.03,9 Fri,Lunch,No,3.0,1 Fri,Lunch,Yes,13.68,6 Sat,Dinner,No,139.63,45 Sat,Dinner,Yes,120.77,42 Sun,Dinner,No,180.57,57 Sun,Dinner,Yes,66.82,19 Thur,Dinner,No,3.0,1 Thur,Lunch,No,117.32,44 Thur,Lunch,Yes,51.51,17 ```
{ "+1": 0, "-1": 0, "confused": 0, "eyes": 0, "heart": 0, "hooray": 0, "laugh": 0, "rocket": 0, "total_count": 0, "url": "https://api.github.com/repos/pandas-dev/pandas/issues/2100/reactions" }
https://api.github.com/repos/pandas-dev/pandas/issues/2100/timeline
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