近期因个人需要接触playwright，由于playwright新接触，想用jupyter进行API测试学习。刚开始使用sync_playwright，在playwright的Conda运行环境中，以console模式和单文件直接运行模式，都能正常运行。但是进入jupyter中后，sync_playwright就无法运行了。会出现如下提示：
Error: It looks like you are using Playwright Sync API inside the asyncio loop.
Please use the Async API instead.在网上找到（如何在 Jupyter 笔记本中使用 Playwright 库而不是使用常规 .py 脚本（在 Windows 上） - python - SO中文参考 - www.soinside.com）这篇文章，才知道“Jupyter Notebook 使用 asyncio 事件循环，因此您应该使用 async api”。
于是将sync_playwright改成 async_playwright。然后又面临上述文章中的同样问题。
Not Implemented error按照上述文章所说，更改jupyter核心运行库：
1、导航到 Python 目录中的 Lib/site-packages/ipykernel/kernelapp.py
2、将该文件中的一行代码注释掉
if sys.platform.startswith("win") and sys.version_info >= (3, 8):
import asyncio
try:
from asyncio import WindowsProactorEventLoopPolicy, WindowsSelectorEventLoopPolicy
except ImportError:
pass
# not affected
else:
if type(asyncio.get_event_loop_policy()) is WindowsProactorEventLoopPolicy:
# WindowsProactorEventLoopPolicy is not compatible with tornado 6
# fallback to the pre-3.8 default of Selector
# 注释掉此行：asyncio.set_event_loop_policy(WindowsSelectorEventLoopPolicy())
print(f'do not change to Selector Event Loop') #加入一行提示则下述代码运行通过：
from playwright.async_api import async_playwright
playwright = await async_playwright().start()
browser = await playwright.chromium.launch(headless = False,)
c=await browser.new_context(viewport={'width':1024,'height':768})
page = await c.new_page()
await page.goto("http://image.baidu.com")
await page.locator("#kw").fill("XXX...")
await page.locator("#homeSearchForm > span.s_btn_wr > input").click()
async with page.expect_popup() as page1_info:
await page.locator("#imgid > div > ul > li:nth-child(6)").click()
page1 = await page1_info.value
await browser.close()
await playwright.stop()此问题产生的原因，在这篇文章中有所描述：（Running Playwright in JupyterLab Notebook Problem - Not implemented Error - #2 by fomightez - JupyterLab - Jupyter Community Forum）
目前microsoft在github playwright的bug回复里，这个问题并没有得到解决。所以这只能是一时之选。