python - 如何在Python中向用户定义函数添加计数器？

Question

>>> Exception in Tkinter callback
Traceback (most recent call last):
  File "C:\Users\Maximillian\AppData\Local\Programs\Python\Python37-32\lib\tkinter\__init__.py", line 1705, in __call__
    return self.func(*args)
  File "C:\Python-koding\steinsakspapir.py", line 64, in scissors
    botwin += 1
UnboundLocalError: local variable 'botwin' referenced before assignment

-尝试从代码的其余部分中删除 botwin 和 youwin-尝试使用youwin = youwin + 1

    def scissors():
        bot = random.randint(1,3)
       user = 3
       if user == bot:
            printfuver = ("Stalemate, booth players choose scissors")
           printfu = Label(lowerframe, text=printfuver, fg="blue")
            printfu.pack()
        if user == 3 and bot == 1:
            printfuver = ("Rock crushes scissors, bot win! ")
            printfu = Label(lowerframe, text=printfuver, fg="red")
            printfu.pack()
            botwin += 1
        if user == 3 and bot == 2:
            printfuver = ("Scissors cut paper, you win! ")
            printfu = Label(lowerframe, text=printfuver, fg="green")
            printfu.pack()
            youwin += 1

只是希望每次运行函数后 botwin 的值增加 1。

提前致谢

Answer 1

除了代码中的缩进错误之外，这可能是一个范围问题。检查并确保您的代码中某处有 botwin = 0 或类似的内容。如果该代码位于函数中或超出全局范围，请将其放在代码的顶部。然后，在引用它的所有函数中，将 global botwin 放在函数的开头，如所述 here .

希望这对您有帮助。