1def make_string_pep440_compatible(raw_str): 2 """ 3 pep440 only allows a subset of characters in the 4 version name: 5 6 - alphanumeric 7 - dots 8 9 this will restrict the string to that set. 10 """ 11 final_chars = [] 12 for r in raw_str: 13 if "a" <= r <= "z" or "A" <= r <= "Z" or "0" <= r <= "9" or r == ".": 14 final_chars.append(r) 15 return "".join(final_chars) 16