Method transform

sklearn/utils/_testing.py:1290–1293

(self, X, y=None)

        return self

    def transform(self, X, y=None):
        check_is_fitted(self)
        X = check_array(X)
        return X

    def fit_transform(self, X, y=None):
        return self.fit(X, y).transform(X, y)