def validate_filter_countries_arg()

in geocoding_lambda/lambda_function.py [0:0]

• 19 lines of code
• 7 McCabe index (conditional complexity)

def validate_filter_countries_arg(arg: str) -> Tuple[bool, Optional[List[str]]]:
    logger = logging.getLogger(__name__)
    filter_countries_arg = None
    try:
        assert isinstance(arg, str) and len(arg.strip())
        filter_countries_arg = json.loads(arg)
    except (AssertionError, JSONDecodeError) as exc:
        logger.debug(exc)
        logger.error('Argument provided is not a JSON string.')
        return False, None
    
    try:
        assert isinstance(filter_countries_arg, list) and len(filter_countries_arg) > 0
        for country_arg in filter_countries_arg:
            assert isinstance(country_arg, str) and len(country_arg.strip()) > 0
    except AssertionError as exc:
        logger.debug(exc)
        logger.error('Argument provided is not a list of strings.')
        return False, None
    
    return True, filter_countries_arg