def groups(self):
if self._groups is not None:
return self._groups
if len(self.groupings) == 1:
self._groups = self.primary.groups
else:
to_groupby = zip(*(ping.grouper for ping in self.groupings))
to_groupby = Index(to_groupby)
axis = self.obj._get_axis(self.axis)
self._groups = _tseries.groupby(axis, to_groupby)
return self._groups
def groups(self):
if self._groups is None:
self._groups = _tseries.groupby(self.index, self.grouper)
return self._groups