pandas.core.groupby.GroupBy.cummax

GroupBy.cummax(axis=0, **kwargs)[source]

Cumulative max for each group.

Returns
Series or DataFrame

See also

Series.groupby

Apply a function groupby to a Series.

DataFrame.groupby

Apply a function groupby to each row or column of a DataFrame.

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https://pandas.pydata.org/pandas-docs/version/1.3.4/reference/api/pandas.core.groupby.GroupBy.cummax.html