Python函式不回傳任何內容-TicTacToe

下面這段代碼的問題是，除了列印陳述句之外，check_win()函式沒有回傳任何東西，我可以通過放棄 while 回圈中的所有邏輯而不使用函式來解決這個問題，但我希望這段代碼清晰明了，有什么建議嗎？

board = {
    'a1': '', 'a2': '', 'a3': '',
    'b1': '', 'b2': '', 'b3': '',
    'c1': '', 'c2': '', 'c3': ''
}

player_one = True

player_one_choice = input("Play player one: ")
if player_one_choice in board:
    board[player_one_choice] = 'x'
    player_one = False

elif player_one_choice not in board:
    print("Wrong input")
print(board)

checkwin = False


def check_win():
    """
    'x' check win logic
    """
    # Vertical check logic
    if 'x' in board['a1'] and 'x' in board['a2'] and 'x' in board['a3']:
        print("congrats x won")
        checkwin == True
    elif 'x' in board['b1'] and 'x' in board['b2'] and 'x' in board['b3']:
        print("congrats x won")
        checkwin == True
    elif 'x' in board['c1'] and 'x' in board['c2'] and 'x' in board['c3']:
        print("congrats x won")
        checkwin == True

    # Horizontal check logic
    elif 'x' in board['a1'] and 'x' in board['b1'] and 'x' in board['c1']:
        print("congrats x won")
        checkwin == True
    elif 'x' in board['a2'] and 'x' in board['b2'] and 'x' in board['c2']:
        print("congrats x won")
        checkwin == True
    elif 'x' in board['a3'] and 'x' in board['b3'] and 'x' in board['c3']:
        print("congrats x won")
        checkwin == True

    # Diagonal check logic
    elif 'x' in board['a1'] and 'x' in board['b2'] and 'x' in board['c3']:
        print("congrats x won")
        checkwin == True
    elif 'x' in board['a3'] and 'x' in board['b2'] and 'x' in board['c1']:
        print("congrats x won")
        checkwin == True

    elif 'o' in board['a1'] and 'o' in board['a2'] and 'o' in board['a3']:
        print("congrats o won")
        checkwin == True
    elif 'o' in board['b1'] and 'o' in board['b2'] and 'o' in board['b3']:
        print("congrats o won")
        checkwin == True
    elif 'o' in board['c1'] and 'o' in board['c2'] and 'o' in board['c3']:
        print("congrats o won")
        checkwin == True

    # Horizontal check logic
    elif 'o' in board['a1'] and 'o' in board['b1'] and 'o' in board['c1']:
        print("congrats o won")
        checkwin == True
    elif 'o' in board['a2'] and 'o' in board['b2'] and 'o' in board['c2']:
        print("congrats o won")
        checkwin == True
    elif 'o' in board['a3'] and 'o' in board['b3'] and 'o' in board['c3']:
        print("congrats o won")
        checkwin == True

    # Diagonal check logic
    elif 'o' in board['a1'] and 'o' in board['b2'] and 'o' in board['c3']:
        print("congrats o won")
        checkwin == True
    elif 'o' in board['a3'] and 'o' in board['b2'] and 'o' in board['c1']:
        print("congrats o won")
        checkwin == True

    return check_win


while True:
    check_win()

    player_two_choice = input("PLay player two: ")

    if player_two_choice != 'x' and player_one_choice in board:
        board[player_two_choice] = 'o'
        player_one = True
        print(board)
    if player_two_choice != 'x' and player_one_choice not in board or player_two_choice == 'a' or player_two_choice == 'b' or player_two_choice == 'c':
        print("Wrong input")

    check_win()

    if checkwin:
        break

    player_one_choice = input("Play player one: ")

    if player_one_choice in board:
        board[player_one_choice] = 'x'
        player_one = False

    elif player_one_choice not in board:
        print("Wrong input")
        break

    print(board)

This is the ```output``` I am receiving

Play player one: a1
{'a1': 'x', 'a2': '', 'a3': '', 'b1': '', 'b2': '', 'b3': '', 'c1': '', 'c2': '', 'c3': ''}
PLay player two: b1
{'a1': 'x', 'a2': '', 'a3': '', 'b1': 'o', 'b2': '', 'b3': '', 'c1': '', 'c2': '', 'c3': ''}
Play player one: a2
{'a1': 'x', 'a2': 'x', 'a3': '', 'b1': 'o', 'b2': '', 'b3': '', 'c1': '', 'c2': '', 'c3': ''}
PLay player two: b2
{'a1': 'x', 'a2': 'x', 'a3': '', 'b1': 'o', 'b2': 'o', 'b3': '', 'c1': '', 'c2': '', 'c3': ''}
Play player one: a3
{'a1': 'x', 'a2': 'x', 'a3': 'x', 'b1': 'o', 'b2': 'o', 'b3': '', 'c1': '', 'c2': '', 'c3': ''}
congrats x won
PLay player two: b3
{'a1': 'x', 'a2': 'x', 'a3': 'x', 'b1': 'o', 'b2': 'o', 'b3': 'o', 'c1': '', 'c2': '', 'c3': ''}
congrats x won
Play player one: 
Wrong input

Process finished with exit code 0

uj5u.com熱心網友回復：

你拼錯了 checkwin 變數

改變這個：

return check_win

對此：

return checkwin

在第 84 行

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