DataFrame.mask()
pandas.DataFrame.mask
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DataFrame.mask(cond, other=nan, inplace=False, axis=None, level=None, try_cast=False, raise_on_error=True)
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Return an object of same shape as self and whose corresponding entries are from self where cond is False and otherwise are from other.
Parameters: cond : boolean NDFrame, array or callable
If cond is callable, it is computed on the NDFrame and should return boolean NDFrame or array. The callable must not change input NDFrame (though pandas doesn’t check it).
New in version 0.18.1.
A callable can be used as cond.