用python写一个石头剪刀布游戏程序，要求共5000次对决，前1000次，公平对决；后4000次，电脑2作弊，要求平局的概率是1/3，电脑2获胜的概率是5/9，电脑1获胜的概率是1/9；

好的，下面是一个基于Python的石头剪刀布游戏程序，满足您的要求：

import random

def get_user_choice():
    while True:
        user_choice = input("请出拳：石头（1）、剪刀（2）、布（3）：")
        if user_choice in ['1', '2', '3']:
            return int(user_choice)
        else:
            print("输入有误，请重新输入！")

def get_computer1_choice():
    # 公平对决，随机出拳
    return random.randint(1, 3)

def get_computer2_choice(is_cheating):
    if is_cheating:
        # 电脑2作弊，按照概率出拳
        rand_num = random.random()
        if rand_num < 1/3:
            return 1  # 石头
        elif rand_num < 4/9:
            return 2  # 剪刀
        else:
            return 3  # 布
    else:
        # 公平对决，随机出拳
        return random.randint(1, 3)

def get_result(user_choice, computer1_choice, computer2_choice):
    if user_choice == computer1_choice == computer2_choice:
        return 0  # 平局
    elif user_choice == 1 and computer2_choice == 2 \
            or user_choice == 2 and computer2_choice == 3 \
            or user_choice == 3 and computer2_choice == 1:
        return 1  # 用户获胜
    elif computer1_choice == 1 and computer2_choice == 2 \
            or computer1_choice == 2 and computer2_choice == 3 \
            or computer1_choice == 3 and computer2_choice == 1:
        return -1  # 电脑1获胜
    else:
        return -2  # 电脑2获胜

def main():
    fair_rounds = 1000  # 前1000次公平对决
    cheating_rounds = 4000  # 后4000次电脑2作弊
    user_win_count = 0
    computer1_win_count = 0
    computer2_win_count = 0
    tie_count = 0

    # 公平对决
    for i in range(fair_rounds):
        user_choice = get_user_choice()
        computer1_choice = get_computer1_choice()
        computer2_choice = get_computer2_choice(False)
        result = get_result(user_choice, computer1_choice, computer2_choice)
        if result == 1:
            user_win_count += 1
            print("你赢了！")
        elif result == -1:
            computer1_win_count += 1
            print("电脑1赢了！")
        elif result == 0:
            tie_count += 1
            print("平局！")
        else:
            computer2_win_count += 1
            print("电脑2赢了！")

    # 电脑2作弊
    for i in range(cheating_rounds):
        user_choice = get_user_choice()
        computer1_choice = get_computer1_choice()
        computer2_choice = get_computer2_choice(True)
        result = get_result(user_choice, computer1_choice, computer2_choice)
        if result == 1:
            user_win_count += 1
            print("你赢了！")
        elif result == -1:
            computer1_win_count += 1
            print("电脑1赢了！")
        elif result == 0:
            tie_count += 1
            print("平局！")
        else:
            computer2_win_count += 1
            print("电脑2赢了！")

    print(f"\n公平对决{fair_rounds}次，电脑2作弊{cheating_rounds}次，总共进行了{fair_rounds+cheating_rounds}次。")
    print(f"你获胜了{user_win_count}次，电脑1获胜了{computer1_win_count}次，电脑2获胜了{computer2_win_count}次，平局{tie_count}次。")
    print("游戏结束！")

if __name__ == '__main__':
    main()

程序会先让用户输入自己出拳的选项，然后分别由公平的电脑1和作弊的电脑2来出拳，最后判断输赢并输出结果。控制公平对决和作弊对决的次数，最后输出总的结果。