Why can't I get responses from tasks (asyncio) when working with httpx?

Question

Python

Hello! I worked before with the aiohttp library, but due to the fact that this library does not support HTTPS protocol, I decided to try httpx. There was a problem with the fact that I can not get answers from tasks, I can not understand what the problem is. What exactly am I doing wrong?

from typing import AsyncIterable
import httpx
import asyncio

proxies = [] # Здесь у меня список проксей.

async def a():
    tasks = []
    for proxy in proxies:
        tasks.append(loop.create_task(b(proxy)))
    result = await asyncio.gather(*tasks)
    print(result)

async def b(proxy):
    async with httpx.AsyncClient(proxies=proxy) as client:
        response = await client.get('https://wtfismyip.com/text')
        return response.text
        

loop = asyncio.get_event_loop()
loop.create_task(a())
loop.run_forever()