实现一个基于面向对象思想的、具有添加好友、删除好友、展示好友、退出功能的好友管理系统。python

好的，下面是一个用Python实现的好友管理系统：

class Friend:
    def __init__(self, name, contact):
        self.name = name
        self.contact = contact

class FriendManager:
    def __init__(self):
        self.friends = []

    def add_friend(self, name, contact):
        friend = Friend(name, contact)
        self.friends.append(friend)

    def remove_friend(self, name):
        for friend in self.friends:
            if friend.name == name:
                self.friends.remove(friend)
                print("{} has been removed from your friend list.".format(name))
                return
        print("{} is not in your friend list.".format(name))

    def show_friends(self):
        if not self.friends:
            print("You haven't added any friends yet.")
        else:
            print("Your friend list:")
            for friend in self.friends:
                print("{}: {}".format(friend.name, friend.contact))

    def exit(self):
        print("Goodbye!")
        exit()

if __name__ == "__main__":
    fm = FriendManager()
    while True:
        print("What would you like to do?")
        print("1. Add a friend")
        print("2. Remove a friend")
        print("3. Show your friend list")
        print("4. Exit")

        choice = input("> ")
        if choice == "1":
            name = input("Enter your friend's name: ")
            contact = input("Enter your friend's contact: ")
            fm.add_friend(name, contact)
        elif choice == "2":
            name = input("Enter your friend's name: ")
            fm.remove_friend(name)
        elif choice == "3":
            fm.show_friends()
        elif choice == "4":
            fm.exit()
        else:
            print("Invalid choice. Please try again.")

在这个程序中，我们定义了一个Friend类来表示好友，它包含了两个属性：姓名和联系方式。我们还定义了一个FriendManager类来管理好友列表，它包含了添加好友、删除好友、展示好友和退出功能。

在主程序中，我们创建了一个FriendManager对象fm，并进入一个循环，等待用户输入操作。用户可以选择添加好友、删除好友、展示好友或退出程序。根据用户的选择，我们调用FriendManager类中相应的方法来执行相应的操作。

希望这个程序能够满足你的需求！