pandas.core.groupby.DataFrameGroupBy.cummax
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DataFrameGroupBy.cummax(axis=None, skipna=True, *args, **kwargs)
- Return cumulative max over requested axis.
Parameters: axis : {index (0), columns (1)}
skipna : boolean, default True
Exclude NA/null values. If an entire row/column is NA, the result will be NA
Returns: cummax : Series
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Licensed under the 3-clause BSD License.
https://pandas.pydata.org/pandas-docs/version/0.19.2/generated/pandas.core.groupby.DataFrameGroupBy.cummax.html