'Transform X using the inverse function.
Parameters
X : array-like, shape (n_samples, n_features)
Input array.
y : (ignored)
.. deprecated::0.19
Returns
X_out : array-like, shape (n_samples, n_features)
Transformed input.'

def inverse_transform(self, X, y='deprecated'):

    if ((not isinstance(y, string_types)) or (y != 'deprecated')):
        warnings.warn('The    parameter    y    on    inverse_transform()    is    deprecated    since    0.19    and    will    be    removed    in    0.21', DeprecationWarning)
    return self._transform(X, y=y, func=self.inverse_func, kw_args=self.inv_kw_args)
