code: def show_comment(self, value):
          
          comments = self.get_comments()
          comments = [x for x in comments if x['comment'] == value]
          if len(comments) == 0:
              raise Exception("Unknown comment")
          else:
              return comments[0]
docs: Get a specific canned comment
  
          :type value: str
          :param value: Canned comment to show
  
          :rtype: dict
          :return: A dictionnary containing canned comment description