如何在大型管理器中并发运行异步 launchers/concurrently 运行 asyncio 函数

Question

我正在努力使我的代码运行更快地查找 roblox 帐户名。

此代码是在我的另一个问题中提供的（我在这里进行了修改）。它工作得很好，但处理大量帐户仍然需要几分钟的时间。通常我不会在意，但我正试图达到 100,000 个帐户，所以我需要性能。这就是它能跑多快？或者我们可以进一步推动它吗？答案只是更多 CPU/memory 吗？更好的互联网？我是否需要网络编程，或者是否有更快、无需请求的方式？

代码：

import asyncio
import aiohttp


async def find_account(url, session, id):
    try:
        async with session.get(url) as response:
            if response.status == 200:
                r = await response.read()
                from bs4 import BeautifulSoup
                soup = BeautifulSoup(r, 'html.parser')
                h2 = []
                for i in soup.find_all('h2'):
                    h2.append(i)
                print('Done')
                return str(list(list(h2)[0])[0]) + '  ' + str(url)
            else:
                return 'This account does not exist ID: {}'.format(id)
    except aiohttp.ServerDisconnectedError:
        print('Done')
        return find_account(url, session, id)


async def main(min_id, max_id):
    tasks = []
    async with aiohttp.ClientSession() as session:
        for id in range(min_id, max_id):
            url = f'https://web.roblox.com/users/{str(id)}/profile'
            tasks.append(asyncio.create_task(find_account(url=url, session=session, id=id)))

        return await asyncio.gather(*tasks)


from time import time
loop = asyncio.get_event_loop()
starting = int(input("Type Your Starting Id Number>> "))
ending = int(input("Type Your Ending Id Number>> "))
timer = time()
users = loop.run_until_complete(main(starting, ending))
users = [i for i in users if i != '1']
print(users)
print(time()-timer)

Answer 1

您可以运行 BeautifulSoup 在多个进程中加快速度。例如，您可以提取 find_account 中进行解析的部分并将其传递给进程池执行程序：

import concurrent.futures
_pool = concurrent.futures.ProcessPoolExecutor()

def parse(html):
    from bs4 import BeautifulSoup
    soup = BeautifulSoup(html, 'html.parser')
    h2 = []
    for i in soup.find_all('h2'):
        h2.append(i)
    return str(list(list(h2)[0])[0])

async def find_account(url, session, id):
    while True:
        async with session.get(url) as response:
            if response.status == 200:
                r = await response.read()
                loop = asyncio.get_event_loop()
                extracted = await loop.run_in_executor(_pool, parse, r)
                print('Done')
                return extracted + '  ' + str(url)
            else:
                return 'This account does not exist ID: {}'.format(id)
    except aiohttp.ServerDisconnectedError:
        print('Done')
        # keep looping

顺便提一下，您对 find_account() 的递归调用是不正确的，因为它缺少 await。上面的代码修复了这个问题并改为切换到循环，这使得代码实际上正在循环更加明确。

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