janken.py

#
# じゃんけんゲーム
import random

# 入力値が0 or 1 or 2か判定
def validate_hands(hand):
    try:
        #数値で0,1,2なら正しい入力値とする（Trueを返す）
        hand_num = int(hand)
        return hand_num == 0 or hand_num == 1 or hand_num == 2
    except:
        return False


# じゃんけんの勝敗を判定
# result = (0:プレイヤーの勝ち、1:CPUの勝ち、2:あいこ)
def janken(player_hand, cpu_hand):
    result = 1
    player_hand_num = int(player_hand)
    cpu_hand_num = cpu_hand
    if (player_hand_num == 0 and cpu_hand_num == 1) or (player_hand_num == 1 and cpu_hand_num == 2) or (player_hand_num == 2 and cpu_hand_num == 0):
        result = 0
    elif player_hand_num ==  cpu_hand_num:
        result = 2
    return result

# 0 or 1 or 2 をそれぞれ"ぐー"、"ちょき"、"ぱー"に変換する
def get_hand(hand):
    if hand == 0:
        return "ぐー"
    elif hand == 1:
        return "ちょき"
    elif hand == 2:
        return "ぱー"
    else:
        return "不明???"

# ゲームのメイン関数
def start_repl(n):
    i = 1
    player_win_count = 0
    cpu_win_count = 0
    print("じゃんけんをしよう！")
    print(str(n) + "回勝負だよ。")
    while i <= n:
        print("最初はぐー、じゃんけん...（手を選んでね）")
        print("ぐー:0、ちょき:1、ぱー:2")
        print("> ",end="")
        hand = input()
        cpu_hand = random.randint(0,2)
        if validate_hands(hand):
            i += 1
            result = janken(hand,cpu_hand)
            result_string = "あいこ"
            if result == 0:
                player_win_count += 1
                result_string = "あなたの勝ち!"
            elif result == 1:
                cpu_win_count += 1
                result_string = "CPUの勝ち!"
            print("ぽん!")
            print("あなた: {}".format(get_hand(int(hand))))
            print("CPU: {}\n".format(get_hand(cpu_hand)))
            print("結果: {}\n".format(result_string))
        else:
            print("やり直し")
    print("{}回勝負の結果:".format(n))
    if player_win_count > cpu_win_count:
        print("  あなたの勝ち")
    elif cpu_win_count > player_win_count:
        print("  CPUの勝ち")
    else:
        print("  引き分け")


if __name__ == "__main__":
    start_repl(3)