先登录https://my.telegram.org/auth，选择API development tools

记下自己的api_id和api_hash

我用Python写的一个小程序，用jupyter notebook一步一步写的，没有封装

from telethon import TelegramClient, events, utils
import ddddocr
import os

# 使用ddddocr识别图片验证码
def ocr(path):
    model = ddddocr.DdddOcr(show_ad=False)
    with open(path, 'rb') as f:
        image = f.read()
    return model.classification(image)

# 填入自己的api_id和api_hash
api_id = *******
api_hash = '***********************************'
# 自己取个名字，我这里填的是AutoCheckin
client = TelegramClient('AutoCheckIn', api_id, api_hash)
# 登录
await client.start()

# 厂妹签到逻辑
@client.on(events.NewMessage(chats=1429576125))
async def handler(event):
    if ('已经' in event.message.text) or ('签到成功' in event.message.text):
        chat_name = utils.get_display_name(await client.get_entity(1429576125))
        print('{}：\n{}'.format(chat_name,event.message.text))
    elif '输入签到验证码' in event.message.text:
        path = await event.message.download_media()
        await client.send_message(1429576125, ocr(path))
        os.remove(path)
    elif '无需清理' in event.message.text:
        pass
    else:
        await client.send_message(1429576125, '/cancel')

# 获取对话列表
await client.get_dialogs()
# 开始签到
await client.send_message(1429576125, '/checkin')

效果：