Python 使用aiohttp lib美汤

Question

有人知道怎么做:

import html5lib
import urllib
from bs4 import BeautifulSoup

soup = BeautifulSoup(urllib.request.urlopen('http://someWebSite.com').read().decode('utf-8'), 'html5lib')

使用 aiohttp 而不是 urllib？

谢谢^^

Answer 1

你可以这样做：

import asyncio
import aiohttp
import html5lib
from bs4 import BeautifulSoup

SELECTED_URL = 'http://someWebSite.com'

async def get_site_content():
    async with aiohttp.ClientSession() as session:
        async with session.get(SELECTED_URL) as resp:
            text = await resp.read()

    return BeautifulSoup(text.decode('utf-8'), 'html5lib')

loop = asyncio.get_event_loop()
sites_soup = loop.run_until_complete(get_site_content())
print(sites_soup)
loop.close()

Answer 2

仅供正在寻找更多答案的人使用：还有另一种方法运行循环中的同步代码：loop.run_in_executor.

更多文档：https://docs.python.org/3/library/asyncio-eventloop.html#asyncio.loop.run_in_executor

示例代码：

import asyncio
import time

def blocking_func():
    time.sleep(5)
    return 42

async def main(loop):
    result = await loop.run_in_executor(None, blocking_func)
    return result

loop = asyncio.get_event_loop()
loop_result = loop.run_until_complete(main(loop))
print(loop_result) # => 42

因此，您可以像使用协程一样等待您的任务

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