python入门pk小游戏

import time
import random

flag = True
while flag:
    player_win = 0
    enemy_win = 0
    for i in range(1, 4):
        print('第'+str(i)+'轮pk赛')
        player_life = random.randint(100, 150)
        enemy_life = random.randint(100, 150)
        player_attack = random.randint(20, 30)
        enemy_attack = random.randint(20, 30)
        print("【自己】
生命值：{}
攻击值：{}".format(player_life, player_attack))
        print('-----------------------')
        time.sleep(1)
        print("【敌人】
生命值：{}
攻击值：{}".format(enemy_life, enemy_attack))
        print('-----------------------')
        time.sleep(1)

        while player_life > 0 and enemy_life > 0:
            enemy_life = enemy_life-player_attack
            print("您向敌人发起了攻击，敌人的生命值剩余：{}".format(enemy_life))
            time.sleep(1)
            player_life = player_life-enemy_attack
            print("敌人向您发起了反击，您的生命值剩余：{}".format(player_life))
            print('-----------------------')
            time.sleep(1)

        if (player_life > 0) and (enemy_life <= 0):
            player_win += 1
            print('您赢了')
        elif (player_life <= 0) and (enemy_life > 0):
            enemy_win += 1
            print('敌人赢了')
        elif (enemy_life < 0) and (player_life < 0):
            print('平局')

        print('-----------------------')
        time.sleep(1)
    if player_win > enemy_win:
        print('您赢了')
    elif enemy_win > player_win:
        print('敌人赢了')
    else:
        print('平局')

    ask = input('你要再来一局吗？继续输入y,其他退出')
    if ask == 'y':
        flag = True
    else:
        flag = False
        print('已结束')