精华用 Python 写一个自己的命令行待办工具（含完整源码）

#!/usr/bin/env python3
"""todo.py —— 极简命令行待办"""
import argparse, json, os
from dataclasses import dataclass, asdict

DATA = os.path.expanduser('~/.todo.json')

@dataclass
class Item:
    id: int
    text: str
    done: bool = False

def load():
    if not os.path.exists(DATA):
        return []
    with open(DATA, encoding='utf-8') as f:
        return [Item(**d) for d in json.load(f)]

def save(items):
    with open(DATA, 'w', encoding='utf-8') as f:
        json.dump([asdict(i) for i in items], f, ensure_ascii=False, indent=2)

def cmd_add(args):
    items = load()
    nxt = max((i.id for i in items), default=0) + 1
    items.append(Item(nxt, args.text))
    save(items)
    print(f'已添加 #{nxt} {args.text}')

def cmd_list(args):
    for i in load():
        if args.all or not i.done:
            mark = 'x' if i.done else ' '
            print(f'[{mark}] {i.id:>3}  {i.text}')

def cmd_done(args):
    items = load()
    for i in items:
        if i.id == args.id:
            i.done = True
    save(items)
    print(f'#{args.id} 已完成')

def cmd_rm(args):
    items = load()
    save([i for i in items if i.id != args.id])
    print(f'已删除 #{args.id}')

def main():
    p = argparse.ArgumentParser(prog='todo')
    sub = p.add_subparsers(dest='cmd', required=True)

    a = sub.add_parser('add');  a.add_argument('text'); a.set_defaults(func=cmd_add)
    l = sub.add_parser('list'); l.add_argument('-a','--all',action='store_true'); l.set_defaults(func=cmd_list)
    d = sub.add_parser('done'); d.add_argument('id', type=int);  d.set_defaults(func=cmd_done)
    r = sub.add_parser('rm');   r.add_argument('id', type=int);  r.set_defaults(func=cmd_rm)

    args = p.parse_args()
    args.func(args)

if __name__ == '__main__':
    main()

python todo.py add "写周报"
python todo.py list
python todo.py done 1
python todo.py rm 2