def reset_df_index(data_frame):
    """
    Resets pandas data frame index, dropping current index and replacing it
    with a "clean" index in place. Useful after data frame filtering and multi-
    value column splitting.

    :param data_frame: pandas data frame (pd df)
    :return: resets index index in place in original df (None)
    """
    return data_frame.reset_index(drop=True, inplace=True)