异步IO（asynchronous IO）

import aiohttp
import asyncio
import time


async def getPokemon(session, url):
    async with session.get(url) as resp:
        pokemon = await resp.json()
        return pokemon['name']

async def main(loop):
    async with aiohttp.ClientSession(loop=loop) as session:
        tasks = []
        for number in  range(1,151):
            url = f'https://pokeapi.co/api/v2/pokemon/{number}'
            tasks.append(asyncio.ensure_future(getPokemon(session, url)))

        original_pokemon = await asyncio.gather(*tasks)
        return original_pokemon

if __name__ == '__main__':
    start_time = time.time()
    loop = asyncio.get_event_loop()
    pokemons = loop.run_until_complete(main(loop))
    print("elapse time:{:.3f}, pokemon num:{}".format(time.time()-start_time, len(pokemons)))