pandas.DataFrame.where

DataFrame.where(cond, other=nan, inplace=False, axis=None, level=None, try_cast=False, raise_on_error=True)

Return an object of same shape as self and whose corresponding entries are from self where cond is True and otherwise are from other.

Parameters :

cond : boolean NDFrame or array

other : scalar or NDFrame

inplace : boolean, default False

Whether to perform the operation in place on the data

axis : alignment axis if needed, default None

level : alignment level if needed, default None

try_cast : boolean, default False

try to cast the result back to the input type (if possible),

raise_on_error : boolean, default True

Whether to raise on invalid data types (e.g. trying to where on strings)

Returns :

wh : same type as caller