code: def uvalues(a, encoding='utf-8', fallback='iso-8859-1'):
      
  
      try:
          return encoding, [s.decode(encoding) for s in a]
  
      except UnicodeError:
          return fallback, [s.decode(fallback) for s in a]
docs: Return a list of decoded values from an iterator.
  
      If any of the values fail to decode, re-decode all values using the
      fallback.