python-telegram-bot 在会话处理程序之间传递参数

Question

我正在尝试编写一个机器人，用户在其中单击命令，发送 link 作为消息，然后机器人将 link 添加到某个数据库。它的外观如下：

所以我想我应该使用 ConversationHandler。这是我写的， bot.py:

from telegram.ext import (Updater, CommandHandler, MessageHandler, Filters,
        ConversationHandler)
from settings import BOT_TOKEN
import commands

def main():
    updater = Updater(BOT_TOKEN, use_context=True)
    dispatcher = updater.dispatcher

    conversation = ConversationHandler(
            entry_points=[
                MessageHandler(
                    (Filters.command & Filters.regex("al_(.*)")),
                    commands.add_link
                )
            ],
            states={
                commands.ADD_LINK: [
                    MessageHandler(Filters.entity("url"), commands.receive_link)
                ]
            },
            fallbacks=[]
    )

    dispatcher.add_handler(CommandHandler("search", commands.search))
    dispatcher.add_handler(conversation)

    updater.start_polling()
    updater.idle()

if __name__ == "__main__":
    main()

命令在另一个名为 commands.py:

的文件中

from telegram.ext import ConversationHandler

ADD_LINK = range(1)

def receive_link(update, context):
    bot = context.bot
    url = update.message.text
    chat_id = update.message.chat.id

    bot.send_message(
            chat_id=chat_id,
            text="The link has been added."
    )
    return ConversationHandler.END

def add_link(update, context):
    bot = context.bot
    uuid = update.message.text.replace("/al_", "")
    chat_id = update.message.chat.id
    bot.send_message(
            chat_id=chat_id,
            text="Send the link as a message."
    )

    return ADD_LINK

现在的问题是我需要能够在我的 receive_link 函数中使用 uuid 变量（在 add_link 中生成）。但我不知道如何传递这个变量。我该怎么做？

Answer 1

借助这个article，我就这样解决了

By using context.user_data in any Handler callback, you have access to a user-specific dict.

所以我的代码将更改如下：

from telegram.ext import ConversationHandler

ADD_LINK = range(1)

def receive_link(update, context):
    bot = context.bot
    url = update.message.text
    chat_id = update.message.chat.id
    uuid = context.user_data["uuid"]

    bot.send_message(
            chat_id=chat_id,
            text=f"The link has been added to '{uuid}'."
    )
    return ConversationHandler.END

def add_link(update, context):
    bot = context.bot
    uuid = update.message.text.replace("/al_", "")
    context.user_data["uuid"] = uuid
    chat_id = update.message.chat.id
    bot.send_message(
            chat_id=chat_id,
            text=f"Send the link as a message."
    )

    return ADD_LINK

我这样存储 uuid 变量：

context.user_data["uuid"] = uuid

并像这样使用它：

uuid = context.user_data["uuid"]

非常简单直观。这是输出：

python-telegram-bot 在会话处理程序之间传递参数

python-telegram-bot Pass argument between conversation handlers

python

python-telegram-bot