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DatetimeIndex min failure #1895

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changhiskhan opened this issue Sep 11, 2012 · 0 comments

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@changhiskhan
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commented Sep 11, 2012

In [14]: rng = pd.date_range('2012-8-1', freq='T', periods=100)

In [15]: m = rng.min()

In [16]: m
Out[16]: ---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
...

c:\code\pandas\pandas\tseries\index.py in __repr__(self)
    472
    473         summary = str(self.__class__)
--> 474         if len(self) == 1:
    475             first = _format_datetime64(values[0], tz=self.tz)
    476             summary += '\n[%s]' % first

TypeError: len() of unsized object

In [17]: type(m)
Out[17]: pandas.tseries.index.DatetimeIndex

In [20]: rng.asobject.min()
Out[20]: Index(<Timestamp: 2012-08-01 00:00:00>, dtype=object)

@ghost ghost assigned wesm Sep 12, 2012

@wesm wesm closed this in 82b0d2a Sep 13, 2012

yarikoptic added a commit to neurodebian/pandas that referenced this issue Sep 27, 2012
Merge commit 'v0.8.1-203-g67121af' into debian
* commit 'v0.8.1-203-g67121af': (193 commits)
  BUG: DataFrame column formatting issue in length-truncated column close pandas-dev#1906
  BUG: override min/max in DatetimeIndex to function as expected close pandas-dev#1895
  BUG: DataFrame mixed-type arithmetic column-wise, fix DataFrame.diff upcasting->object bug close pandas-dev#1896
  BUG: treat nobs=1 >= min_periods case in rolling_std/variance as 0 trivially. close pandas-dev#1884
  TST: skip to_file test if URLError occurs on some systems
  VB: resolve test name conflict and update make script
  DOC: minor change to build script to help auto build process
  DOC: fixed extlinks in sphinx conf
  TST: oops import in wrong place
  TST: skip test_console_encode if sys.stdin.encoding is None
  TST: unit test for pandas-dev#1902 and default to csv.QUOTE_MINIMAL
  Make it possible to set quoting for to_csv
  ENH: clean up pandas-dev#1691 changes, rls note
  ENH: add more possible bool values to read_csv pandas-dev#1295
  BUG: fix rolling_max/min for small inputs and large windows. Add a check that the min_period <= window size. Fixes pandas-dev#1897.
  Mention Ubuntu for NeuroDebian repository
  BUG: don't clobber color keyword in Series.plot, close pandas-dev#1890
  DOC: add intersphinx mapping for python library, close pandas-dev#1556
  BUG: fix mixed-integer .ix indexing bugs. closepandas-dev#1799
  BUG: unicode sheet name in to_excel pandas-dev#1828
  ...
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