Fix python-telegram-bot NetworkError with aiohttp

import asyncio
import os

import telegram
from ptbcontrib.aiohttp_request import AiohttpRequest


async def main():
    bot = telegram.Bot(
        os.environ["TELEGRAM_BOT_TOKEN"],
        request=AiohttpRequest(),
        get_updates_request=AiohttpRequest(),
    )
    async with bot:
        print(await bot.get_me())


if __name__ == '__main__':
    asyncio.run(main())

import logging
import os

from telegram import Update
from telegram.ext import ApplicationBuilder, ContextTypes, CommandHandler
from ptbcontrib.aiohttp_request import AiohttpRequest

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

async def start(update: Update, context: ContextTypes.DEFAULT_TYPE):
    await context.bot.send_message(chat_id=update.effective_chat.id, text="I'm a bot, please talk to me!")

if __name__ == '__main__':
    application = (
        ApplicationBuilder()
        .token(os.environ["TELEGRAM_BOT_TOKEN"])
        .request(AiohttpRequest(connection_pool_size=256))
        .get_updates_request(AiohttpRequest())
        .build()
    )

    start_handler = CommandHandler('start', start)
    application.add_handler(start_handler)

    application.run_polling()