code: def quote(code):
      
  
      try:
          code = code.rstrip()
  
      except AttributeError:
          # code is not a string, may be None --> There is no code to quote
          return code
  
      if code and code[0] + code[-1] not in ('""', "''", "u'", '"') \
         and '"' not in code:
          return 'u"' + code + '"'
      else:
          return code
docs: Returns quoted code if not already quoted and if possible
  
      Parameters
      ----------
  
      code: String
      \tCode thta is quoted