PTB init bot with proxy

bot.py

import logging

from telegram.ext import (Updater, Dispatcher, ConversationHandler, CommandHandler,
                          MessageHandler, RegexHandler, Filters,
                          CallbackContext,)
from telegram import Update, KeyboardButton, ReplyKeyboardMarkup, ReplyKeyboardRemove, ReplyMarkup
import requests

logging.basicConfig(
    format='%(asctime)s - %(name)s - %(levelname)s - %(message)s', level=logging.DEBUG
)

logger = logging.getLogger(__name__)


def error(update, errorMsg):
    logger.warning('Update "%s" caused "%s" ', update, errorMsg)


class Bot:
    def __init__(self, token):
        REQ = {
            'proxy_url': 'socks5h://127.0.0.1:9050',
            'urllib3_proxy_kwargs': {
                'username': '1',
                'password': '1',
            },
            'connect_timeout': 200,
        }
        self.updater = Updater(
            token=token, use_context=True, request_kwargs=REQ)
        self.dispatcher = self.updater.dispatcher
        self.dispatcher.add_error_handler(error)
        start = CommandHandler('start', self.start)
        self.dispatcher.add_handler(start)


    def start(self, update: Update, context: CallbackContext):
        update.message.reply_text('hi')

    def run(self):
        self.updater.start_polling()
        self.updater.idle()