AIOHTTP:TypeError: index() takes 0 positional arguments but 1 was given

Question

from aiohttp import web
import aiohttp
from settings import config
import asyncio
import psycopg2 as p
import json
import aiopg

import aiohttp
import asyncio

async def fetch(client):
    async with client.get('https://jsonplaceholder.typicode.com/todos/1') as resp:
        assert resp.status == 200
        return await resp.json()

async def index():
    async with aiohttp.ClientSession() as client:
        html = await fetch(client)
        return web.Response(html)

loop = asyncio.get_event_loop()
loop.run_until_complete(index())

这是我的views.py

from aiohttp import web
from routes import setup_routes
from settings import config

app = web.Application()
setup_routes(app)

web.run_app(app,port=9090)

main.py

from views import index

def setup_routes(app):
    app.router.add_get('/', index)

这是我的 routes.py

但是每当我尝试触发 localhost:9090 的 url 时，我只会收到内部服务器 500 错误说

TypeError: index() takes 0 positional arguments but 1 was given

但是我可以在终端中打印 json 但无法触发与浏览器中的网络响应相同的方式我不知道在这种情况下有什么问题

Answer 1

您的 index() 异步函数应接受 request 参数以兼容网络处理程序。

Answer 2

您的 index 协程是一个 handler, so it must accept a single positional argument, which will receive a Request 实例。例如：

async def index(request):
    async with aiohttp.ClientSession() as client:
        html = await fetch(client)
        return web.Response(html)

views.py 顶层的 loop.run_until_complete(index()) 是不必要的，一旦 index() 被正确定义就不会起作用。

AIOHTTP:TypeError: index() takes 0 positional arguments but 1 was given

AIOHTTP:TypeError: index() takes 0 positional arguments but 1 was given

async-await

python-asyncio

aiohttp

pytest-aiohttp