这两个 python 异步代码示例有什么区别？ 我试图理解为什么使用 aiohttp 而不是请求

Question

I have seen an example of code that looks like this:

import json
import os
import aiohttp
import asyncio

tokens = ['token1', 'token2', 'token3']

async def main():
    async with aiohttp.ClientSession() as session:
        await asyncio.gather(*[exchange_token(session, i) for i in tokens])

async def exchange_token(session, refresh_token):
    params={'grant_type':'refresh_token',
    'refresh_token':refresh_token,
    'client_secret':os.environ['CLIENT_SECRET'],
    'client_id':os.environ['CLIENT_ID']}

    async with session.post('https://test.com/token', data=params) as response:
        jdata = await response.json()
        print(jdata)

asyncio.run(main())

It's not clear to me exactly why aiohttp is used instead of requests. This code using requests also works, can someone please explain to me the difference and why this second example is not really correct use of asyncio?

import json
import os
import requests
import asyncio

tokens = ['token1', 'token2', 'token3']

async def main():
    await asyncio.gather(*[exchange_token(i) for i in tokens])

async def exchange_token(refresh_token):
    params={'grant_type':'refresh_token',
    'refresh_token':refresh_token,
    'client_secret':os.environ['CLIENT_SECRET'],
    'client_id':os.environ['CLIENT_ID']}

    response = await api_request(params)
    jdata = json.loads(response.text)
    print(jdata)

async def api_request(params):
    response = requests.post('https://test.com/token', data=params)
    return response

asyncio.run(main())

Answer 1

I have seen an example of code that looks like this:

import json
import os
import aiohttp
import asyncio

tokens = ['token1', 'token2', 'token3']

async def main():
    async with aiohttp.ClientSession() as session:
        await asyncio.gather(*[exchange_token(session, i) for i in tokens])

async def exchange_token(session, refresh_token):
    params={'grant_type':'refresh_token',
    'refresh_token':refresh_token,
    'client_secret':os.environ['CLIENT_SECRET'],
    'client_id':os.environ['CLIENT_ID']}

    async with session.post('https://test.com/token', data=params) as response:
        jdata = await response.json()
        print(jdata)

asyncio.run(main())

It's not clear to me exactly why aiohttp is used instead of requests. This code using requests also works, can someone please explain to me the difference and why this second example is not really correct use of asyncio?

import json
import os
import requests
import asyncio

tokens = ['token1', 'token2', 'token3']

async def main():
    await asyncio.gather(*[exchange_token(i) for i in tokens])

async def exchange_token(refresh_token):
    params={'grant_type':'refresh_token',
    'refresh_token':refresh_token,
    'client_secret':os.environ['CLIENT_SECRET'],
    'client_id':os.environ['CLIENT_ID']}

    response = await api_request(params)
    jdata = json.loads(response.text)
    print(jdata)

async def api_request(params):
    response = requests.post('https://test.com/token', data=params)
    return response

asyncio.run(main())

Answer 2

I have seen an example of code that looks like this:

import json
import os
import aiohttp
import asyncio

tokens = ['token1', 'token2', 'token3']

async def main():
    async with aiohttp.ClientSession() as session:
        await asyncio.gather(*[exchange_token(session, i) for i in tokens])

async def exchange_token(session, refresh_token):
    params={'grant_type':'refresh_token',
    'refresh_token':refresh_token,
    'client_secret':os.environ['CLIENT_SECRET'],
    'client_id':os.environ['CLIENT_ID']}

    async with session.post('https://test.com/token', data=params) as response:
        jdata = await response.json()
        print(jdata)

asyncio.run(main())

It's not clear to me exactly why aiohttp is used instead of requests. This code using requests also works, can someone please explain to me the difference and why this second example is not really correct use of asyncio?

import json
import os
import requests
import asyncio

tokens = ['token1', 'token2', 'token3']

async def main():
    await asyncio.gather(*[exchange_token(i) for i in tokens])

async def exchange_token(refresh_token):
    params={'grant_type':'refresh_token',
    'refresh_token':refresh_token,
    'client_secret':os.environ['CLIENT_SECRET'],
    'client_id':os.environ['CLIENT_ID']}

    response = await api_request(params)
    jdata = json.loads(response.text)
    print(jdata)

async def api_request(params):
    response = requests.post('https://test.com/token', data=params)
    return response

asyncio.run(main())