GroupBy

This namespace is available after calling DataFrame.group_by(...).

GroupBy.__iter__()	Allows iteration over the groups of the group by operation.
GroupBy.agg(*aggs, **named_aggs)	Compute aggregations for each group of a group by operation.
GroupBy.all()	Aggregate the groups into Series.
GroupBy.apply(function)	Apply a custom/user-defined function (UDF) over the groups as a sub-DataFrame.
GroupBy.count()	Return the number of rows in each group.
GroupBy.first()	Aggregate the first values in the group.
GroupBy.head([n])	Get the first n rows of each group.
GroupBy.last()	Aggregate the last values in the group.
GroupBy.len([name])	Return the number of rows in each group.
GroupBy.map_groups(function)	Apply a custom/user-defined function (UDF) over the groups as a sub-DataFrame.
GroupBy.max()	Reduce the groups to the maximal value.
GroupBy.mean()	Reduce the groups to the mean values.
GroupBy.median()	Return the median per group.
GroupBy.min()	Reduce the groups to the minimal value.
GroupBy.n_unique()	Count the unique values per group.
GroupBy.quantile(quantile[, interpolation])	Compute the quantile per group.
GroupBy.sum()	Reduce the groups to the sum.
GroupBy.tail([n])	Get the last n rows of each group.