code: def camel2snake(name:str)->str:
      "Change `name` from camel to snake style."
      s1 = re.sub(_camel_re1, r'\1_\2', name)
      return re.sub(_camel_re2, r'\1_\2', s1).lower(f camel2snake(name:str)->str:
      "Change `name` from camel to snake style."
      s1 = re.sub(_camel_re1, r'\1_\2', name)
      return re.sub(_camel_re2, r'\1_\2', s1).lower()
docs: Change `name` from camel to snake style.