如何从 greenlet 调用异步方法（编剧）

Question

我的框架（Locust，https://github.com/locustio/locust) is based on gevent and greenlets. But I would like to leverage Playwright (https://playwright.dev/python/），它是基于 asyncio 构建的。

天真地使用 Playwrights 同步 api 不起作用并给出异常：

playwright._impl._api_types.Error: It looks like you are using Playwright Sync API inside the asyncio loop.
Please use the Async API instead.

我正在寻找有关如何将异步与 gevent 结合使用的最佳实践。

我尝试了几种不同的方法，但我不知道我是否接近或者我尝试做的事情是否可行（我对 gevent 有一些经验，但之前没有真正使用过 asyncio）

编辑：我现在有点工作了（我删除了 Locust 并直接生成了一些 greenlets 以使其更容易理解）。这已经很好了，还是有更好的解决方案？

import asyncio
import threading
from playwright.async_api import async_playwright
import gevent


def thr(i):
    loop = asyncio.new_event_loop()
    asyncio.set_event_loop(loop)
    loop.run_until_complete(do_stuff(i))
    loop.close()


async def do_stuff(i):
    playwright = await async_playwright().start()
    browser = await playwright.chromium.launch(headless=False)
    page = await browser.new_page()
    await page.wait_for_timeout(5000)
    await page.goto(f"https://google.com")
    await page.close()
    print(i)


def green(i):
    t = threading.Thread(target=thr, args=(i,))
    t.start()
    # t.join() # joining doesnt work, but I couldnt be bothered right now :)



g1 = gevent.spawn(green, 1)
g2 = gevent.spawn(green, 2)
g1.join()
g2.join()

Answer 1

受@user4815162342 的评论启发，我做了这样的事情：

from playwright.async_api import async_playwright # need to import this first
from gevent import monkey, spawn
import asyncio
import gevent

monkey.patch_all()
loop = asyncio.new_event_loop()


async def f():
    print("start")
    playwright = await async_playwright().start()
    browser = await playwright.chromium.launch(headless=True)
    context = await browser.new_context()
    page = await context.new_page()
    await page.goto(f"https://www.google.com")
    print("done")


def greeny():
    while True:  # and not other_exit_condition
        future = asyncio.run_coroutine_threadsafe(f(), loop)
        while not future.done():
            gevent.sleep(1)


greenlet1 = spawn(greeny)
greenlet2 = spawn(greeny)
loop.run_forever()

实际实施将在 Locust 某天结束，可能经过一些优化（重用浏览器实例等）

如何从 greenlet 调用异步方法（编剧）

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