def unescape_charref(data, encoding):
    try:
      name, base = data, 10
      if name.lower().startswith("x"):
          name, base= name[1:], 16
      try:
          result = int(name, base)
      except:
          base = 16
      uc = unichr(int(name, base))
      if encoding is None:
          return uc
      else:
          try:
              repl = uc.encode(encoding)
          except UnicodeError:
              repl = "&#%s;" % data
          return repl
    except:
      return data