在asyncio循环中使用Playwright Sync API报错求助

错误原因 #

你当前的代码运行在asyncio事件循环环境中（比如Jupyter Notebook、IPython，或者包含async/await的程序），Playwright同步API不允许在异步循环内执行，必须切换为异步API，或者在纯同步环境运行代码。

解决方案一：使用Playwright异步API #

替换为异步版本代码，用asyncio.run()执行：

import asyncio
from playwright.async_api import async_playwright

async def main():
    async with async_playwright() as playwright:
        browser = await playwright.chromium.launch()
        page = await browser.new_page()
        await page.goto("https://playwright.dev/")
        await page.screenshot(path="example.png")
        await browser.close()

asyncio.run(main())

解决方案二：在纯同步环境运行原代码 #

如果想继续用同步API，需要确保代码不在asyncio循环中执行：

• 如果是在Jupyter/IPython中，使用魔法命令强制在独立进程运行：

  %%script python
  from playwright.sync_api import sync_playwright
  
  with sync_playwright() as playwright:
      browser = playwright.chromium.launch()
      page = browser.new_page()
      page.goto("https://playwright.dev/")
      page.screenshot(path="example.png")
      browser.close()
  

• 或者将原代码保存为.py文件，直接用Python命令行运行：

  python your_script.py
  

内容的提问来源于stack exchange，提问作者ArchaeonSeq