python实现好友管理系统的基本功能，包括添加好友、删除好友、备注好友、展示好友等。

在Python中实现一个基础的好友管理系统，我们可以设计一个简单的类结构，比如`User`和`FriendManager`。这里是一个基本的设计：

class User:
    def __init__(self, id, name, nickname=None):
        self.id = id
        self.name = name
        self.nickname = nickname
        self.friends = []

    def add_friend(self, friend_id):
        if friend_id not in [u.id for u in self.friends]:
            self.friends.append(friend_id)
    
    def delete_friend(self, friend_id):
        if friend_id in [u.id for u in self.friends]:
            self.friends.remove(friend_id)

    def set_nickname(self, friend_id, nickname):
        for user in self.friends:
            if user == friend_id:
                user.nickname = nickname

    def show_friends(self):
        return {f'id': u.id, 'name': u.name, 'nickname': u.nickname} for u in self.friends


class FriendManager:
    def __init__(self):
        self.users = {}

    def add_user(self, user):
        self.users[user.id] = user

    def remove_user(self, user_id):
        if user_id in self.users:
            del self.users[user_id]

    def manage_friend(self, user_id, action, *args):
        if user_id in self.users:
            getattr(self.users[user_id], action)(*args)


# 使用示例
manager = FriendManager()
user1 = User(1, 'Alice')
user2 = User(2, 'Bob', 'Bobo')

manager.add_user(user1)
manager.add_user(user2)
user1.add_friend(user2.id)  # 添加好友
user1.set_nickname(user2.id, 'Bobby')  # 贝记好友昵称
manager.manage_friend(user1.id, 'show_friends')  # 展示好友列表