def change_case(column_name: str) -> str:
    """
    Change from Sample Type or SampleType to sample_type
    :param column_name:
    :return:
    """
    return ''.join(['_' + i.lower() if i.isupper()
                    else i for i in column_name]).lstrip('_').\
        replace("(", "").replace(")", "").\
        replace("/", "_per_")