TypeError: An asyncio.Future, a coroutine or an awaitable is required

Question

I'm trying to make an asynchronous web scraper using beautifulsoup and aiohttp.This is my initial code to start things.I'm getting a [TypeError: An asyncio.Future, a coroutine or an awaitable is required] and having a hard time figuring out what is wrong with my code.I am new to python and would appreciate any help regarding this.

import bs4
import asyncio
import aiohttp


async def parse(page):
    soup=bs4.BeautifulSoup(page,'html.parser')
    soup.prettify()
    print(soup.title)



async def request():
    async with aiohttp.ClientSession() as session:
        async with session.get("https://google.com") as resp:
            await parse(resp)



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

Traceback:-

Traceback (most recent call last):
  File "C:\Users\User\Desktop\Bot\aio-req\parser.py", line 21, in <module>
    loop.run_until_complete(request)
  File "C:\Users\User\AppData\Local\Programs\Python\Python38-32\lib\asyncio\base_events.py", line 591, in run_until_complete
    future = tasks.ensure_future(future, loop=self)
  File "C:\Users\User\AppData\Local\Programs\Python\Python38-32\lib\asyncio\tasks.py", line 673, in ensure_future
    raise TypeError('An asyncio.Future, a coroutine or an awaitable is '
TypeError: An asyncio.Future, a coroutine or an awaitable is required

Answer 1

一个问题loop.run_until_complete(request)应该是loop.run_until_complete(request())- 您实际上必须调用它才能返回协程。

还有其他问题 - 就像您将aiohttp.ClientResponse对象传递给parse并将其视为 text/html 一样。我让它与以下一起工作，但不知道它是否适合您的需求，因为 parse它不再是一个协程。

def parse(page):
    soup=bs4.BeautifulSoup(page,'html.parser')
    soup.prettify()
    return soup.title

async def fetch(session, url):
    async with session.get(url) as response:
        return await response.text()

async def request():
    async with aiohttp.ClientSession() as session:
        html = await fetch(session, "https://google.com")
        print(parse(html))

if __name__ == '__main__':
    loop=asyncio.get_event_loop()
    loop.run_until_complete(request())

这也有效：

def parse(page):
    soup=bs4.BeautifulSoup(page,'html.parser')
    soup.prettify()
    print(soup.title)

async def request():
    async with aiohttp.ClientSession() as session:
        async with session.get("https://google.com") as resp:
            parse(await resp.text())

最后，您的原始代码，将一个可等待的响应对象传递给parse然后awaiting for page.text()。

async def parse(page):
    soup=bs4.BeautifulSoup(await page.text(),'html.parser')
    soup.prettify()
    print(soup.title)

async def request():
    async with aiohttp.ClientSession() as session:
        async with session.get("https://google.com") as resp:
            await parse(resp)