一个三层小循环

for i in range(10):
    print("我是老大", i)
    for k in range(10):
        print("我是老二", k)
        for p in range(10):
                print("我是老三", p)
                if p == 2:
                    break_flag = True
                    break
        if break_flag:
            break
    if break_flag:
        print("老大跑了，我也跟着跑吧！")
        break
print("城市套路深，我要回农村。")

out_flag = False
count = 0
while out_flag == False:
    print("第一层")
    while out_flag == False:
        print("第二层")
        while out_flag == False:
            print("第三层")
            count +=1
            if count == 2 :   #这一步可有可无
                out_flag = True
print("我出来了2333")