preprocessing.py 文件源码

def inverse_transform(self, X):
        non_cat = pd.DataFrame(X[:, :len(self.non_cat_columns_)],
                               columns=self.non_cat_columns_)
        cats = []
        for col in self.cat_columns_:
            slice_ = self.cat_blocks_[col]
            categories = self.categories_map_[col]
            ordered = self.ordered_map_[col]

            codes = X[:, slice_].argmax(1)
            series = pd.Series(pd.Categorical.from_codes(
                codes, categories, ordered=ordered
            ), name=col)
            cats.append(series)
        df = pd.concat([non_cat] + cats, axis=1)[self.columns_]
        return df