import re import roman CAMEL_CASE_TO_PSEUDO_SNAKE_CASE_CONVERSION_REGEX_1 = re.compile('(.)([A-Z][a-z]+)') CAMEL_CASE_TO_PSEUDO_SNAKE_CASE_CONVERSION_REGEX_2 = re.compile('([a-z0-9])([A-Z])') def convert_camel_case_to_pseudo_snake_case(text): """ Converts camel case to pseudo snake case using hyphen instead of underscore. E. g. ThisText is converted to this-text. Credits: epost (http://stackoverflow.com/a/1176023) """ s1 = CAMEL_CASE_TO_PSEUDO_SNAKE_CASE_CONVERSION_REGEX_1.sub(r'\1-\2', text) return CAMEL_CASE_TO_PSEUDO_SNAKE_CASE_CONVERSION_REGEX_2.sub(r'\1-\2', s1).lower() def to_roman(number): """ Converts an arabic number within range from 1 to 4999 to the corresponding roman number. Returns None on error conditions. """ try: return roman.toRoman(number) except (roman.NotIntegerError, roman.OutOfRangeError): return None