如果我在python中定义了变量，为什么似乎没有定义它？

Question

我开始学习Python，我想知道为什么即使我在函数之上定义了我的变量反函数，它也不会在函数中被识别。

counterofplays = 0  # this variable should be defined below

def tiktaktoe():
    while playing:
        isdigit = False
        inRange = False
        while not isdigit or not inRange:
            playable = True 
            print(firstchoice,"turn")
            index = input("Choose the index:\n" +
                        "1 | 2 | 3\n" +
                        "4 | 5 | 6\n" +
                        "7 | 8 | 9\n")

            if index.isdigit():
                isdigit = True
                index = int(index)
                if index in range(1,4) and row1[index-1][0] == ' ':
                    inRange = True
                    row1[index-1] = firstchoice if index == 3 else firstchoice + " | "
                    counterofplays += 1 # and here it marks error
                elif index in range(4,7) and row2[index-4][0] == ' ':
                    inRange = True
                    row2[index-4] = firstchoice if index == 6 else firstchoice + " | "                
                    counterofplays += 1
                elif index in range(7,10) and row3[index-7][0] == ' ':
                    inRange = True
                    row3[index-7] = firstchoice if index == 9 else firstchoice + " | "                
                    counterofplays += 1
                else:
                    inRange = False
                    playable = False
            else:
                isdigit = False
                playable = False
                print("You've to choose a number")
                sleep(1.3)

Answer 1

您应该尝试将counterofplays直接在TikTakToe()中定义为global，并且不会造成任何问题。由于似乎没有在上述函数之外使用该变量，所以也不能将其设置为global