python3 test failures
on ubuntu 13.04 several tests fail with 3.3 while they suceed with python2
13.04 has python 3.3 and numpy 1.7
current pandas head 61766ec5f898c89

```
======================================================================
FAIL: test_quoting (pandas.io.tests.test_parsers.TestParsers)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/jtaylor/tmp/pandas-0.9.1/build/lib.linux-x86_64-3.3/pandas/io/tests/test_parsers.py", line 528, in test_quoting
    sep='\t')
AssertionError: Exception not raised by read_table

======================================================================
FAIL: test_cant_compare_tz_naive_w_aware (pandas.tseries.tests.test_timeseries.TestTimestamp)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/jtaylor/tmp/pandas-0.9.1/build/lib.linux-x86_64-3.3/pandas/tseries/tests/test_timeseries.py", line 2349, in test_cant_compare_tz_naive_w_aware
    self.assertRaises(Exception, a.__eq__, b.to_pydatetime())
AssertionError: Exception not raised by __eq__

----------------------------------------------------------------------

======================================================================
FAIL: test_more_flexible_frame_multi_function (__main__.TestGroupBy)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/jtaylor/tmp/pandas-0.9.1/build/lib.linux-x86_64-3.3/pandas/tests/test_groupby.py", line 1909, in test_more_flexible_frame_multi_function
    assert_frame_equal(result, expected)
  File "/home/jtaylor/tmp/pandas-0.9.1/build/lib.linux-x86_64-3.3/pandas/util/testing.py", line 167, in assert_frame_equal
    assert(left.columns.equals(right.columns))
AssertionError

----------------------------------------------------------------------

======================================================================
ERROR: test_yahoo (pandas.io.tests.test_yahoo.TestYahoo)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/tmp/pandas/build/lib.linux-x86_64-3.3/pandas/io/tests/test_yahoo.py", line 25, in test_yahoo
    pd.DataReader("F", 'yahoo', start, end)['Close'][-1],
  File "/tmp/pandas/build/lib.linux-x86_64-3.3/pandas/io/data.py", line 58, in DataReader
    retry_count=retry_count, pause=pause)
  File "/tmp/pandas/build/lib.linux-x86_64-3.3/pandas/io/data.py", line 149, in get_data_yahoo
    parse_dates=True)[::-1]
  File "/tmp/pandas/build/lib.linux-x86_64-3.3/pandas/io/parsers.py", line 364, in parser_f
    return _read(filepath_or_buffer, kwds)
  File "/tmp/pandas/build/lib.linux-x86_64-3.3/pandas/io/parsers.py", line 195, in _read
    return parser.read()
  File "/tmp/pandas/build/lib.linux-x86_64-3.3/pandas/io/parsers.py", line 592, in read
    ret = self._engine.read(nrows)
  File "/tmp/pandas/build/lib.linux-x86_64-3.3/pandas/io/parsers.py", line 844, in read
    data = self._reader.read(nrows)
  File "parser.pyx", line 597, in pandas._parser.TextReader.read (pandas/src/parser.c:5342)
  File "parser.pyx", line 619, in pandas._parser.TextReader._read_low_memory (pandas/src/parser.c:5562)
  File "parser.pyx", line 668, in pandas._parser.TextReader._read_rows (pandas/src/parser.c:6143)
  File "parser.pyx", line 655, in pandas._parser.TextReader._tokenize_rows (pandas/src/parser.c:6027)
  File "parser.pyx", line 1385, in pandas._parser.raise_parser_error (pandas/src/parser.c:14807)
pandas._parser.CParserError: Error tokenizing data. C error: Expected 7 fields in line 106, saw 3



```

```
test_more_flexible_frame_multi_function (__main__.TestGroupBy) ... > /home/jtaylor/tmp/pandas-0.9.1/build/lib.linux-x86_64-3.3/pandas/util/testing.py(167)assert_frame_equal()
-> assert(left.columns.equals(right.columns))
(Pdb) p left.columns

[(D, mean), (D, std), (C, mean), (C, std)]
(Pdb) p right.columns
MultiIndex
[(C, mean), (C, std), (D, mean), (D, std)]
```

this one is random probably related to hash randomization

the yahoo one might be due to missing internet connection?
