(self, ddof=1)
return self._accumulate(aggregations.GroupbyVar, ddof=ddof)
Groupby-variance
Groupby-variance
Groupby - variance
def var(self, ddof=1):
        """ Groupby-variance """
        return self._accumulate(aggregations.GroupbyVar, ddof=ddof)
def var ( self , ddof = 1 ) : return self . _accumulate ( aggregations . GroupbyVar , ddof = ddof )