def _FilterBy(df, filter_by_df, filter_by_cols):
    """From the input DataFrame (df), remove the records whose target column (filter_by_cols) values are
    exist in the filter-by DataFrame (filter_by_df)

    Args:
        df (pd.DataFrame): Source dataframe.
        filter_by_df (pd.DataFrame): Filter dataframe.
        filter_by_cols (iterable of str): Filter columns.

    Returns:
        pd.DataFrame: Dataframe filtered by filter_by_df on filter_by_cols
    """
    return df.loc[~df.set_index(filter_by_cols).index.isin(filter_by_df.
        set_index(filter_by_cols).index)]
