如何在python中使用OOP从文本文件创建排行榜？

class Entry:
    def __init__(self, name, score):
        self.name = name
        self.score = score

class Ranking:
    def __init__(self, title):
        self.title = title
        self.entries = []

    def load_entries(self, filename):
        with open(filename, 'r') as file:
            for line in file:
                name, score = line.strip().split(',')
                entry = Entry(name, int(score))
                self.entries.append(entry)

    def add_entry(self, name, score):
        entry = Entry(name, score)
        self.entries.append(entry)

    def get_top_entries(self, num_entries):
        sorted_entries = sorted(self.entries, key=lambda x: x.score, reverse=True)
        return sorted_entries[:num_entries]

    def save_entries(self, filename):
        with open(filename, 'w') as file:
            for entry in self.entries:
                file.write(f"{entry.name},{entry.score}\n")

# 示例用法
ranking = Ranking("游戏排行榜")
ranking.load_entries("entries.txt")
ranking.add_entry("玩家1", 100)
top_entries = ranking.get_top_entries(5)
ranking.save_entries("new_entries.txt")