Number each group from 0 to the number of groups - 1.

This is the enumerative complement of cumcount. Note that the numbers given to the groups match the order in which the groups would be seen when iterating over the groupby object, not the order they are first observed.

New in version 0.20.2.

param ascending
bool, default True

If False, number in reverse, from number of group - 1 to 0.


Series Unique numbers for each group.


This feature is currently unsupported by Intel Scalable Dataframe Compiler