黑马程序员的PYthon语言程序设计基础（第二版）这本书的程序练习题8.1借鉴实例15.1的代码思路，采用乒乓球规则模拟比赛，分析体育竞技规律的Python详细步骤，每一步要有注释

好的，下面是详细步骤和注释：

1. 定义两个变量分别代表两个球员的初始得分，并打印输出

player1_score = 0
player2_score = 0
print("比赛开始，双方得分均为0")

2. 定义一个变量来判断当前是哪个球员发球，初始化为1表示第一个球员发球

current_serve = 1

3. 定义一个while循环来模拟比赛，循环条件为其中一个球员得分超过11分并且两个球员的得分差距大于等于2分

while (player1_score < 11 and player2_score < 11) or abs(player1_score - player2_score) < 2:
    # 循环体代码

4. 循环体内部先判断当前发球的球员是谁，然后根据随机数模拟是否得分，并更新得分

    # 判断当前是哪个球员发球
    if current_serve == 1:
        # 模拟球员1发球，随机数生成0或1，0表示未得分，1表示得分
        if random.randint(0, 1) == 1:
            player1_score += 1
            print("球员1得分，当前比分为{}:{}".format(player1_score, player2_score))
        else:
            print("球员1未得分，当前比分为{}:{}".format(player1_score, player2_score))
    else:
        # 模拟球员2发球
        if random.randint(0, 1) == 1:
            player2_score += 1
            print("球员2得分，当前比分为{}:{}".format(player1_score, player2_score))
        else:
            print("球员2未得分，当前比分为{}:{}".format(player1_score, player2_score))

5. 每次循环结束后判断是否需要交换发球权，如果当前得分为偶数，则交换发球权

    # 判断是否需要交换发球
    if (player1_score + player2_score) % 2 == 0:
        current_serve = 3 - current_serve

6. 循环结束后打印输出比赛结果

print("比赛结束，最终比分为{}:{}".format(player1_score, player2_score))

完整代码如下：

import random

player1_score = 0
player2_score = 0
print("比赛开始，双方得分均为0")

current_serve = 1

while (player1_score < 11 and player2_score < 11) or abs(player1_score - player2_score) < 2:
    if current_serve == 1:
        if random.randint(0, 1) == 1:
            player1_score += 1
            print("球员1得分，当前比分为{}:{}".format(player1_score, player2_score))
        else:
            print("球员1未得分，当前比分为{}:{}".format(player1_score, player2_score))
    else:
        if random.randint(0, 1) == 1:
            player2_score += 1
            print("球员2得分，当前比分为{}:{}".format(player1_score, player2_score))
        else:
            print("球员2未得分，当前比分为{}:{}".format(player1_score, player2_score))

    if (player1_score + player2_score) % 2 == 0:
        current_serve = 3 - current_serve

print("比赛结束，最终比分为{}:{}".format(player1_score, player2_score))