接收错误，“timesUsrPlayed”未定义 Pylance(reportUndefinedVariable)'答案

【问题标题】：Receiving error, 'timesUsrPlayed" is not defined Pylance(reportUndefinedVariable)'接收错误，“timesUsrPlayed”未定义 Pylance(reportUndefinedVariable)'
【发布时间】：2021-09-11 10:28:50
【问题描述】：

我在函数之外定义了“timesUsrPlayed”变量，因此它不会重置它。当我将 1 添加到变量时，我在函数“randomPartOfGame”中调用 var 'timesUsrPlayed' 的时间下得到黄色摆动线。当我将鼠标悬停在显示“timesUsrPlayed”未定义 Pylance（reportUndefinedVariable）”的行上时。我真的希望我说得清楚：

import os
import random

# a funcion to clear the console
clear = lambda: os.system('cls')

# counts the plays
timesUsrPlayed = 0

def randomPartOfGame():    
    n = random.randint(0,6)
    p = random.randint(0,6)
    print(str(n) + " and " + str(p))

    if n != p:
        print("im sorry try again")
        randomPartOfGame()
        timesUsrPlayed += 1
    elif n == p:
        print("yay you did, it took you "+ str(timesUsrPlayed) +" times to get a double")
    


def mainGameFunction():
    print('game starting...')
    time.sleep(2)
    clear()
    print('welcome you need to get a double in dice (is means get the same number)')
    randomPartOfGame()

【问题讨论】：

标签： python

【解决方案1】：

我更改了您的代码，在您的 recursion 函数的第一个添加 global timesUsrPlayed（有关为什么在 recursion 函数中需要 global 变量的更多详细信息，请阅读此 link） .

然后是print(f"{n} and {p}") 和print(f"yay you did, it took you {timesUsrPlayed} times to get a double")。

试试这个：

import os
import random
import time


# a funcion to clear the console
clear = lambda: os.system('cls')

# counts the plays
timesUsrPlayed = 0

def randomPartOfGame():    
    global timesUsrPlayed
    n = random.randint(0,6)
    p = random.randint(0,6)
    print(f"{n} and {p}")

    if n != p:
        print("im sorry try again")
        randomPartOfGame()
        timesUsrPlayed += 1
    elif n == p:
        print(f"yay you did, it took you {timesUsrPlayed} times to get a double")
    


def mainGameFunction():
    print('game starting...')
    time.sleep(2)
    clear()
    print('welcome you need to get a double in dice (is means get the same number)')
    randomPartOfGame()

【讨论】：

啊，谢谢，我还意识到我在回忆“randomPartOfGame”后添加了部分，所以它在添加之前重新启动。

【解决方案2】：

您必须在 timesUsrPlayed 之前使用 global 关键字来访问您所缺少的全局范围变量示例

  if n != p:
        global timesUsrPlayed
         print("im sorry try again")
         randomPartOfGame()
         timesUsrPlayed += 1

    elif n == p:
   print("yay you did, it took you "+ str(timesUsrPlayed) +" times to get a double")

【讨论】：