def is_abbreviation(abbreviation, longform): category = None outcome = False if len(abbreviation)!=0 and len(longform)!=0: if is_simple(abbreviation, longform): category = 'simple' outcome = True elif is_complex(abbreviation, longform): category = 'complex' outcome = True elif is_substring(abbreviation, longform): category = 'substring' outcome = True return outcome, category