parameters: (self, message, level='info')
docstring: level 为 info、success、error
docstring_summary: level 为 info、success、error
docstring_tokens: level 为 info、success、error
function: def msg(self, message, level='info'):
          '''
          level 为 info、success、error
          '''
          self.message_user(message, level)
function_tokens: def msg ( self , message , level = 'info' ) : self . message_user ( message , level )