python - 在 Python 中永无止境的验证检查

Question

正在使用 Python 开发一款战舰游戏。我检查用户“猜测”输入的功能导致无休止的验证循环。我想在 10x10 网格上以“a10”的格式进行猜测。我为帮助验证而构建的验证函数如下:

  def validate_guess(self,guess):
        while True:
            if (len(guess)) in range(2, 4):
                if guess[0] not in 'abcdefghij' or guess[1:] not in '1,2,3,4,5,6,7,8,9,10':
                    print("Sorry the Grid is a 10x10 square you must enter a valid position.  Try again...")
                    continue

                else:
                    return guess

            else:
                if len(guess) < 2 or len(guess) > 3:
                    print("Oops!  That's too not the right amount of characters. Please try again...")
                    continue

如果用户猜测了一个不正确的值——它确实发现了——但错误是返回一个永无止境的循环和打印的错误语句。

这是我游戏中使用验证函数的部分:

while True:
        print("\n")
        # get guess from player one in coordinate form (example: a10)
        guess = input("{}'s turn to guess: ".format(player1.player))
        # strip characters from the guess input
        guess = guess.strip()
        # validate the guess
        guess = self.validate_guess(guess)
        # append the guess to a list for player 1
        player1.guesses.append(guess)
        # break down the coordinates into x and y variables
        x, y = ship1.split_guess(guess)
        # increment guesses
        guesses += 1
        # loop to assess whether, hit, miss or a won game
        if any(guess in ship for ship in grid2.play_two_board):
            print("HIT")
            grid2.print_guess_board(x, y, "h")
            for ship in grid2.play_two_board:
                try:
                    ship.remove(guess)
                    print(len(Board.play_two_board))
                    self.check_if_sunk(ship)
                    win = self.play_one_win_check(player1.player)
                    if win == 1:
                        print ("GAVE OVER!")
                        break
                except ValueError:
                    pass
        else:
            print("Miss!")
            grid2.print_guess_board(x, y, "m")

不确定是不是因为我有两个 While 语句？真的卡在这里会很感激任何指导。谢谢。

******************************8编辑 --changed 函数以包含猜测，但实际上没有将输入语句中的值传递给它，但仍然遇到同样的问题。

  def validate_guess(self):
        guess = input("Please enter a location:")
        while True:
            if len(guess) in range(2, 4):
                if guess[0] not in 'abcdefghij' or guess[1:] not in '1,2,3,4,5,6,7,8,9,10':
                    print("Sorry the Grid is a 10x10 square you must enter a valid position.  Try again...")
                    continue

                else:
                    return guess

            else:
                if len(guess) < 2 or len(guess) > 3:
                    print("Oops!  That's too not the right amount of characters. Please try again...")
                    continue

然后这样调用它:

while True:
        print("\n")
        # get guess from player one in coordinate form (example: a10)
        # guess = input("{}'s turn to guess: ".format(player1.player))
        # strip characters from the guess input
        # guess = guess.strip()
        # validate the guess
        guess = self.validate_guess()

Answer 1

在 validate_guess 中，当用户输入错误的值时，您必须在再次检查之前获取新的输入。参见 here .

要么从您的函数返回错误代码(真/假？)，要么让函数循环直到输入有效。只需在函数的 while 循环底部为新输入添加一个命令。