为什么我在选择第一个位置后就得到了胜利的消息？

Question

我正试着用python在终端上做一个tic tac toe游戏，但是我不明白为什么我选择了第一个位置之后就得到了胜利的信息，其他人能看到为什么吗？我创建了一个for循环来检查我是否在行或列中获胜，并创建了2个if语句来检查我是否通过对角线获胜。

import random

board = [[' ',' ',' '],
         [' ',' ',' '],
         [' ',' ',' ']]

def checkwin(board):
   for row in board:
        if len(set(row)) == 1:
           return True 
        elif board[0][0] == board[1][1] == board[2][2]:
            return True
        elif board[2][0] == board[1][1] == board[0][2]:
            return True
        else:
           return False

def check_space_taken(board, number):
    if not choose_position(board, number) == ' ':
        return True
    else:
        return False

def choose_position(board, number):
   if number <= 3:
        board[0][number-1] = 'X'
    elif number <= 6:
        board[1][number-4] = 'X'
    elif number <= 9:
        board[2][number-7] = 'X'
    return board, number

def computer_position(board, computer_number):
    computer_number = random.randint(0,9)
    if computer_number <= 3:
        board[0][computer_number-1] = 'O'
    elif computer_number <= 6:
        board[1][computer_number-4] = 'O'
    elif computer_number <= 9:
        board[2][computer_number-7] = 'O'
    return board, computer_number


Game_over = False

while not Game_over:
    print(board)
    player_input = int(input('move to: '))
    changed_board = choose_position(board, player_input)

    for line in changed_board:
        print(line)

    if checkwin(board):
        print('\n-----------------------Congrats you won-----------------------\n')
        Game_over = True

Answer 1

原则上，您的逻辑是正确的，但您需要考虑空格。您还忘记检查列：

def checkwin(board):
    for i in range(3):
        if board[i][0] != " " and board[i][0] == board[i][1] == board[i][2]:
            return True  # found a winning row
        if board[0][i] != " " and board[0][i] == board[1][i] == board[2][i]:
            return True  # found a winning column

    # winning diagonals?
    if board[1][1] != " " and board[0][0] == board[1][1] == board[2][2]:
        return True
    if board[1][1] != " " and board[2][0] == board[1][1] == board[0][2]:
        return True

    return False