pandas.Series.cumsum

Series.cumsum(axis=None, skipna=True, *args, **kwargs) [source]

Return cumulative sum over requested axis.

Parameters:

axis : {index (0)}

skipna : boolean, default True

Exclude NA/null values. If an entire row/column is NA, the result will be NA

Returns:

cumsum : scalar

See also

pandas.core.window.Expanding.sum
Similar functionality but ignores NaN values.

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Licensed under the 3-clause BSD License.
https://pandas.pydata.org/pandas-docs/version/0.21.1/generated/pandas.Series.cumsum.html