def split_allow_list_str()

in data_validation/schema_validation.py [0:0]

• 15 lines of code
• 6 McCabe index (conditional complexity)

def split_allow_list_str(allow_list_str: str) -> list:
    """Split the allow list string into a list of datatype:datatype tuples."""
    # I've not moved this patter to a compiled constant because it should only
    # happen once per command and I felt splitting the pattern into variables
    # aided readability.
    nullable_pattern = r"!?"
    precision_scale_pattern = r"(?:\((?:[0-9 ,\-]+|'UTC')\))?"
    data_type_pattern = nullable_pattern + r"[a-z0-9 ]+" + precision_scale_pattern
    csv_split_pattern = data_type_pattern + r":" + data_type_pattern
    data_type_pairs = [
        _.replace(" ", "").split(":")
        for _ in re.findall(csv_split_pattern, allow_list_str, re.I)
    ]
    invalid_pairs = [_ for _ in data_type_pairs if len(_) != 2]
    if invalid_pairs:
        raise exceptions.SchemaValidationException(
            f"Invalid data type pairs: {invalid_pairs}"
        )
    return data_type_pairs