Python的一个小小问题？

Question

这是一个模拟乐彩的小游戏，主体已完成，但是我想给他加一个按‘x’键才会离开，任意键继续的循环，然后就不知道怎么办了，如代码中‘#注释‘’我已尝试了应该是调用错了，还可以怎么做?

# -*- coding: utf-8 -*-
"""
乐彩小游戏
"""
import random

def generate_num():
    auto_num = []
    while len(auto_num)<6:
        x = random.randint(1, 40)
        if x not in auto_num:
            auto_num.append(x)
    return auto_num

def lottoCheck(a):
    b=generate_num()
    b_sort=sorted(b)
    print("开出顺序：{}".format(b))
    print("大小顺序：{}".format(b_sort))
    print("您选的号码：{}".format(sorted(a)))
    ans = set(a) & set(b_sort)
    if len(ans):
        print("匹配：{}".format(ans))
    else:
        print("不匹配！！！")
        
        
if __name__ == "__main__":
    while True:
        try:
            user_nuber = input("请从1~39个号码任选5个不同的号码，每个号码请以逗号（,）隔开:")
            
            if user_nuber.count(",")<4:
                print("号码不足，",end="")
                raise ValueError
            else:
                n1=[]
                for n in user_nuber.split(","):
                    n = int(n)
                    if n in n1:
                        print("重复输入，",end="")
                        raise ValueError
                    elif n not in range(1,40):
                       print("超出范围！数字必须是1~39，",end="")
                       raise ValueError
                    else:
                       n1.append(n)
                lottoCheck(n1)
                break
        except ValueError:
            print("请再输入一次!")
    #a=input("按x键离开，任选5个不同的号码继续：")
    #if a !="x":
               #n1.append(n)
               #lottoCheck(n1)
    #else:
        #print("再见！")

Answer 1

"""
乐彩小游戏
"""
import random


def generate_num():
    auto_num = []
    while len(auto_num) < 6:
        x = random.randint(1, 40)
        if x not in auto_num:
            auto_num.append(x)
    return auto_num


def lottoCheck(a):
    b = generate_num()
    b_sort = sorted(b)
    print("开出顺序：{}".format(b))
    print("大小顺序：{}".format(b_sort))
    print("您选的号码：{}".format(sorted(a)))
    ans = set(a) & set(b_sort)
    if len(ans):
        print("匹配：{}".format(ans))
    else:
        print("不匹配！！！")


if __name__ == "__main__":
    while True:
        try:
            user_nuber = input("按x键离开，或从1~39个号码任选5个不同的号码，每个号码请以逗号（,）隔开:")
            if user_nuber == 'x':
                break
            if user_nuber.count(",") < 4:
                print("号码不足，", end="")
                raise ValueError
            else:
                n1 = []
                for n in user_nuber.split(","):
                    n = int(n)
                    if n in n1:
                        print("重复输入，", end="")
                        raise ValueError
                    elif n not in range(1, 40):
                        print("超出范围！数字必须是1~39，", end="")
                        raise ValueError
                    else:
                        n1.append(n)
                lottoCheck(n1)
                break
        except ValueError:
            print("请再输入一次!")