def convert_pandas_dtypes_to_builtin_types(col_type):
    """Convert pandas data types to python builtin ones, like pandas object to python str."""
    col_type = str(col_type)
    if "str" in col_type:
        return str
    elif "int" in col_type:
        return int
    elif "float" in col_type:
        return float
    elif "bool" in col_type:
        return bool
    else:
        return str