DataFrameGroupBy.cov(min_periods=None) Compute pairwise covariance of columns, excluding NA/null values

GroupBy.groups dict {group name -> group labels}

DataFrameGroupBy.shift(periods=1, freq=None, axis=0)

GroupBy.sem(ddof=1)

SeriesGroupBy.unique() Return np.ndarray of unique values in the object. Significantly faster than numpy

GroupBy.median()

SeriesGroupBy.value_counts(normalize=False, sort=True, ascending=False, bins=None, dropna=True)

DataFrameGroupBy.resample(rule, *args, **kwargs)

DataFrameGroupBy.any(axis=None, bool_only=None, skipna=None, level=None, **kwargs) Return whether any

GroupBy.size()