old_contents: __version__ = "0.1.0"
  __all__ = ["UnicodeSet", "FrozenUnicodeSet"]
  
  
  def _encode(iterable):
      if iterable is None:
          iterable = []
      return [_encode_char(c) for c in iterable]
  
  
  def _encode_char(char):
      if isinstance(char, int):
          try:
              return unichr(char)
          except Exception:
              return chr(char)
      else:
          try:
              return unicode(char)
          except Exception:
              return char
  
  
  class BaseUnicodeSet(object):
  
      def __init__(self, iterable=None):
          super(BaseUnicodeSet, self).__init__(_encode(iterable))
  
      def __contains__(self, char):
          return super(BaseUnicodeSet, self).__contains__(_encode_char(char))
  
      def __iter__(self):
          return iter(sorted(set(self), key=ord))
  
  
  class UnicodeSet(BaseUnicodeSet, set):
      pass
  
  
  class FrozenUnicodeSet(BaseUnicodeSet, frozenset):
  
      def __new__(cls, iterable=None):
          return frozenset.__new__(cls, _encode(iterable))
  
      def __init__(self, iterable=None):
          return
  
new_contents: __version__ = "0.1.0"
  __all__ = ["UnicodeSet", "FrozenUnicodeSet"]
  
  
  def _encode(iterable):
      if iterable is None:
          iterable = []
      return [_encode_char(c) for c in iterable]
  
  
  def _encode_char(char):
      if isinstance(char, int):
          try:
              return unichr(char)
          except Exception:
              return chr(char)
      else:
          try:
              return unicode(char)
          except Exception:
              return char
  
  
  class BaseUnicodeSet(object):
  
      def __init__(self, iterable=None):
          super(BaseUnicodeSet, self).__init__(_encode(iterable))
  
      def __contains__(self, char):
          return super(BaseUnicodeSet, self).__contains__(_encode_char(char))
  
      def __iter__(self):
          return iter(sorted(set(self), key=ord))
  
  
  class UnicodeSet(BaseUnicodeSet, set):
      pass
  
  
  class FrozenUnicodeSet(BaseUnicodeSet, frozenset):
  
      def __new__(cls, iterable=None):
          return frozenset.__new__(cls, _encode(iterable))
  
      def __init__(self, iterable=None):
          pass
  
subject: use pass instead of empty return