def METHOD_NAME(
    filepath_or_buffer: Union[str, PathLike, StringIO, BytesIO],
    sep: str,
):
    try:
        import pandas as pd
    except ImportError:
        raise ImportError(
            "Pandas is required to load CSV files but not install. "
            "Install it with `pip install pandas` or "
            "`conda install -c conda-forge pandas`."
        ) from None
    return pd.read_csv(filepath_or_buffer, sep=sep)