BUG: Count on resampled PeriodIndex fails · Issue #12774 · pandas-dev/pandas (original) (raw)

In [38]: pd.Series(1, index=pd.period_range(start='2000', periods=100)).resample('M').count()

TypeError Traceback (most recent call last) in () ----> 1 pd.Series(1, index=pd.period_range(start='2000', periods=100)).resample('M').count()

/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/pandas/tseries/resample.py in f(self, _method) 473 474 def f(self, _method=method): --> 475 return self._groupby_and_aggregate(None, _method) 476 f.doc = getattr(GroupBy, method).doc 477 setattr(Resampler, method, f)

/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/pandas/tseries/resample.py in _groupby_and_aggregate(self, grouper, how, *args, **kwargs) 353 354 if grouper is None: --> 355 self._set_binner() 356 grouper = self.grouper 357

/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/pandas/tseries/resample.py in _set_binner(self) 202 203 if self.binner is None: --> 204 self.binner, self.grouper = self._get_binner() 205 206 def _get_binner(self):

/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/pandas/tseries/resample.py in _get_binner(self) 210 """ 211 --> 212 binner, bins, binlabels = self._get_binner_for_time() 213 bin_grouper = BinGrouper(bins, binlabels) 214 return binner, bin_grouper

/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/pandas/tseries/resample.py in _get_binner_for_time(self) 538 if self.kind == 'period': 539 return self.groupby._get_time_period_bins(self.ax) --> 540 return self.groupby._get_time_bins(self.ax) 541 542 def _downsample(self, how, **kwargs):

/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/pandas/tseries/resample.py in _get_time_bins(self, ax) 905 if not isinstance(ax, DatetimeIndex): 906 raise TypeError('axis must be a DatetimeIndex, but got ' --> 907 'an instance of %r' % type(ax).name) 908 909 if len(ax) == 0:

TypeError: axis must be a DatetimeIndex, but got an instance of 'PeriodIndex'

Expected:

Out[39]: 
2000-01    31
2000-02    29
2000-03    31
2000-04     9
Freq: M, dtype: int64

On pandas 0.18