Python朋友管理系统

以下是一个简单的Python好友管理系统的示例：

def add_friend(friends):
    name = input("请输入要添加的好友：")
    friends.append(name)
    print("好友添加成功")

def delete_friend(friends):
    name = input("请输入删除好友姓名：")
    if name in friends:
        friends.remove(name)
        print("删除成功")
    else:
        print("好友不存在")

def modify_friend(friends):
    old_name = input("请输入要修改的好友姓名：")
    if old_name in friends:
        new_name = input("请输入修改后的好友姓名：")
        index = friends.index(old_name)
        friends[index] = new_name
        print("备注成功")
    else:
        print("好友不存在")

def show_friends(friends):
    if len(friends) == 0:
        print("好友列表为空")
    else:
        for friend in friends:
            print(friend)

def friend_management():
    friends = []
    while True:
        print("请输入您的选项：")
        print("1. 添加好友")
        print("2. 删除好友")
        print("3. 备注好友")
        print("4. 展示好友")
        print("5. 退出")
        option = input()
        if option == "1":
            add_friend(friends)
        elif option == "2":
            delete_friend(friends)
        elif option == "3":
            modify_friend(friends)
        elif option == "4":
            show_friends(friends)
        elif option == "5":
            break
        else:
            print("无效的选项")

friend_management()