Question

为什么即使输入了正确的单词，第一个if语句也无法执行。有没有我没考虑过的事情？

编辑 - 我已将问题包含在内，以显示整个代码，以便人们了解问题。

我仍然遇到麻烦。我用.strip（）函数替换了我所做的，但它无法执行。希望上传整个程序将有助于人们了解问题的根源。

from random import randint

game_board = []
player_one = {
    "name": "Player 1",
    "wins": 0,
    "lose": 0
}
player_two = {
    "name": "Player 2",
    "wins": 0,
    "lose": 0
}

colors = {"reset":"\033[00m",
          "red":"\033[91m",
          "green":"\033[92m",
          "yellow":"\033[93m",
          "blue":"\033[94m",
          "pink":"\033[95m",
          "cyan":"\033[96m"
              }


# Building our 5 x 5 board
def build_game_board(board):
    for item in range(5):
        board.append(["O"] * 5)

def show_board(board):
    for row in board:
        print(" ".join(row))

# Defining ships locations
def load_game(board):
    print("WELCOME TO BATTLESHIP!")
    print("Find and sink the ship!")
    del board[:]
    build_game_board(board)
    print(colors['cyan'])
    show_board(board)
    print(colors['reset'])
    ship_col = randint(1, len(board))
    ship_row = randint(1, len(board[0]))
    return {
        'ship_col': ship_col,
        'ship_row': ship_row,
    }

ship_points = load_game(game_board)


# Players will alternate turns.
def player_turns(total_turns):

    if total_turns % 2 == 0:
        total_turns += 1
        return player_one

    return player_two

# Allows new game to start
def play_again():

    positive = ["yes", "y"] 
    negative = ["no", "n"]

    global ship_points

    while True:
        answer = input("Play again? [Y(es) / N(o)]: ").lower().strip()
        if answer in positive:
            ship_points = load_game(game_board)

        elif answer in negative:   
            print("Thanks for playing!")
            exit()

# What will be done with players guesses
def input_check(ship_row, ship_col, player, board):
    guess_col = 0
    guess_row = 0
    while True:
        try:
            guess_row = int(input("Guess Row:")) - 1
            guess_col = int(input("Guess Col:")) - 1
        except ValueError:
            print("Enter a number only: ")
            continue
        else:
            break
    match = guess_row == ship_row - 1 and guess_col == ship_col - 1
    not_on_game_board = (guess_row < 0 or guess_row > 4) or (guess_col < 0 or guess_col > 4)

    if match:
        player["wins"] += 1
        print("Congratulations! You sunk my battleship!")
        print('The current match score is %d : %d (Player1 : Player2)' % (player_one["wins"], player_two["wins"]))
        print("Thanks for playing!")
        play_again()

    elif not match:
        if not_on_game_board:
            print("Oops, that's not even in the ocean.")

        elif board[guess_row][guess_col] == "X" or board[guess_row][guess_col] == "Y":
            print("You guessed that one already.")


        else:
            print("You missed my battleship!")
            if player == player_one:
                board[guess_row][guess_col] = "X"
            else:
                board[guess_row][guess_col] = "Y"

        print(colors['blue'])
        show_board(game_board)
        print(colors['reset'])

    else:
        return 0


def main():
    begin = input('Type \'start\' to begin: ')
    while (begin != str('start')):
        begin = input('Type \'start\' to begin: ')

    for games in range(3):
        for turns in range(6):

            if player_turns(turns) == player_one:
                # print(ship_points)
                print("Player One")
                input_check(
                    ship_points['ship_row'],
                    ship_points['ship_col'],
                    player_one, game_board
                )

            elif player_turns(turns) == player_two:
                print("Player Two")
                input_check(
                    ship_points['ship_row'],
                    ship_points['ship_col'],
                    player_two, game_board
                )

            if turns == 5:
                print("The number of turns has ended.")
                print('The current match score is %d : %d (Player1 : Player2)' % (player_one["wins"], player_two["wins"]))
                play_again()

if __name__ == "__main__":
    main()

Answer 1

尝试以下方法：

positive = ["yes", "y"] 
negative = ["no", "n"]

while True:
    answer = input("Play again? [Y(es) / N(o)]: ").lower().strip()

    if answer in positive:
        ship_points = load_game(game_board)
        break
    elif answer in negative:
        print("Thanks for playing!")
        exit()

您的正面和负面列表都是小写的，因此最好首先小写任何用户答案，并剥去任何额外的空格或换行符。

由于您的代码位于play_again()函数内，因此您需要以某种方式退出函数。您可以添加break语句以退出while循环（然后退出该函数），也可以将break替换为return语句。

Answer 2

回答问题：

正如@Strinnityk所说，我在load_game（）下面添加了一个中断，它产生了所需的结果：

positive = ["yes", "y"] 
negative = ["no", "n"]

while True:
    answer = input("Play again? [Y(es) / N(o)]: ").lower().strip()

    if answer in positive:
        ship_points = load_game(game_board)
        break
    elif answer in negative:
        print("Thanks for playing!")
        exit()

即使正确，第一个语句也无法执行。蟒蛇

2 个答案: