"""
async for
async with
"""

import asyncio, aiohttp

async def check(url):
    async with aiohttp.ClientSession() as session:
        async with session.get(url) as response:
            print(f"{url} : status => {response.status}")

async def puissance2(stop= 10):
    exponent = 0
    while exponent < stop:
        yield 2 ** exponent
        exponent += 1
        await asyncio.sleep(0.2)

async def main():
    liste = []
    async for i in puissance2():
        liste.append(i)
    print(liste)

    liste = [j async for j in puissance2()]