python3.8 and 3.9 support

import logging

import re

from pathlib import Path

from typing import Dict, Iterator, Tuple

from typing import Dict, Iterator, Tuple, Union

import numpy as np

import pandas as pd

            yield index, val, dataframe

            index += 1

    def to_feather(self, file_name: str | os.PathLike, version=2, compression="lz4", **kwargs):

    def to_feather(self, file_name: Union[str, os.PathLike], version=2, compression="lz4", **kwargs):

        """Saves the dataframe as a feather binary file

        Parameters

        df_save.to_feather(file_name, version=version, compression=compression, **kwargs)

    @classmethod

    def from_feather(cls, file_name: str | os.PathLike, to_specifier=True):

    def from_feather(cls, file_name: Union[str, os.PathLike], to_specifier=True):

        """Load the data stored in file_name, where file_name is the direct path to the file.

        Parameters