当你可以通过应用程序简单地schedule一条消息时，不知道为什么你需要Python（除非你试图安排多个接收者）。如果是这样的话，你想使用Python，我相信你需要使用一个机器人。如果您沿着这条路线走下去，请查看python-telegram-bot包中的JobQueues。以下是作业队列wiki的链接，以获取更多信息。希望这有帮助！

为了子孙后代。我在python上使用了pyrogram库。https://docs.pyrogram.org/intro/quickstart

from datetime import datetime, timedelta
from pyrogram import Client
from pyrogram.types import Message, InputMediaPhoto

api_id = 12345
api_hash = "0123456789abcdef0123456789abcdef"
PostChannel = '@mytest'

NextTime = datetime.now() + timedelta(hours=3, minutes=40)
print(NextTime)

app = Client("my_account", api_id, api_hash)

def SendMsg(InMedia, InScheduleDate):
    with app:
        app.send_media_group(chat_id = PostChannel, media = InMedia, schedule_date = InScheduleDate)
        pass
    pass

def GetListPics(InImages):
    L_Out = []
    for img in InImages:
        L_Out.append(InputMediaPhoto(img))
        pass
    return L_Out
    pass

Pics = GetListPics(['pic_01.jpg', 'pic_02.jpg', 'pic_03.jpg'])
SendMsg(Pics, NextTime)