code: def retract(args):
      
      if not args.msg:
          return "Syntax: !vote retract <pollnum>"
      if not args.msg.isdigit():
          return "Not A Valid Positive Integer."
      response = get_response(args.session, args.msg, args.nick)
      if response is None:
          return "You haven't voted on that poll yet!"
      args.session.delete(response)
      return "Vote retracted"
docs: Deletes a vote for a poll.