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pandas.core.window.Expanding.apply
Expanding.apply(func, args=(), kwargs={})
[source]-
expanding function apply
Parameters: func : function
Must produce a single value from an ndarray input *args and **kwargs are passed to the function
Returns: same type as input
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Licensed under the 3-clause BSD License.
https://pandas.pydata.org/pandas-docs/version/0.19.2/generated/pandas.core.window.Expanding.apply.html