_base.py 文件源码

def fit_transform(self, X, y=None, **fit_params):
        """
        Fits the transformer using ``X`` (and possibly ``y``). Transforms
        ``X`` using the transformers, uses :func:`pandas.concat`
        to horizontally concatenate the results.

        Returns:

            ``self``
        """
        verify_x_type(X)
        verify_y_type(y)

        Xts = joblib.Parallel(n_jobs=self.n_jobs)(
            joblib.delayed(_fit_transform)(trans, weight, X, y, **fit_params) for _, trans, weight in self._iter())
        return self.__concat(Xts)