初识 Claude Code

claude "创建一个 Hello World 的 Python 脚本"

import json
import os
from datetime import datetime

class TodoApp:
    def __init__(self, filename='todos.json'):
        self.filename = filename
        self.todos = self.load_todos()

    def load_todos(self):
        if os.path.exists(self.filename):
            with open(self.filename, 'r', encoding='utf-8') as f:
                return json.load(f)
        return []

    def save_todos(self):
        with open(self.filename, 'w', encoding='utf-8') as f:
            json.dump(self.todos, f, ensure_ascii=False, indent=2)

    def add_task(self, task):
        todo = {
            'id': len(self.todos) + 1,
            'task': task,
            'completed': False,
            'created_at': datetime.now().isoformat()
        }
        self.todos.append(todo)
        self.save_todos()
        print(f"✅ 任务已添加：{task}")

    def list_tasks(self):
        if not self.todos:
            print("📝 暂无任务")
            return

        print("\n📋 待办事项列表：")
        for todo in self.todos:
            status = "✓" if todo['completed'] else "○"
            print(f"{status} [{todo['id']}] {todo['task']}")

    def complete_task(self, task_id):
        for todo in self.todos:
            if todo['id'] == task_id:
                todo['completed'] = True
                self.save_todos()
                print(f"✅ 任务已完成：{todo['task']}")
                return
        print(f"❌ 未找到任务 ID: {task_id}")

    def delete_task(self, task_id):
        self.todos = [t for t in self.todos if t['id'] != task_id]
        self.save_todos()
        print(f"🗑️  任务已删除")

def main():
    app = TodoApp()

    while True:
        print("\n" + "="*40)
        print("1. 添加任务")
        print("2. 查看任务")
        print("3. 完成任务")
        print("4. 删除任务")
        print("5. 退出")
        print("="*40)

        choice = input("请选择操作 (1-5): ")

        if choice == '1':
            task = input("输入任务内容: ")
            app.add_task(task)
        elif choice == '2':
            app.list_tasks()
        elif choice == '3':
            task_id = int(input("输入任务 ID: "))
            app.complete_task(task_id)
        elif choice == '4':
            task_id = int(input("输入任务 ID: "))
            app.delete_task(task_id)
        elif choice == '5':
            print("👋 再见！")
            break
        else:
            print("❌ 无效选择")

if __name__ == "__main__":
    main()

# 运行应用
python todo.py

# 预期输出：
========================================
1. 添加任务
2. 查看任务
3. 完成任务
4. 删除任务
5. 退出
========================================
请选择操作 (1-5):