Playwright python版本安装及初步使用教程（记录）

Playwright Python 安装步骤

确保系统已安装 Python 3.7+ 版本。通过 pip 安装 Playwright：

pip install playwright

安装浏览器内核（Chromium、Firefox、WebKit）：

playwright install

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基本使用示例

初始化同步 API 并打开浏览器：

from playwright.sync_api import sync_playwright with sync_playwright() as p: browser = p.chromium.launch(headless=False) page = browser.new_page() page.goto("https://example.com") print(page.title()) browser.close()

异步 API 示例：

import asyncio from playwright.async_api import async_playwright async def main(): async with async_playwright() as p: browser = await p.chromium.launch() page = await browser.new_page() await page.goto("https://example.com") print(await page.title()) await browser.close() asyncio.run(main())

常用操作

页面导航与等待：

page.goto("https://example.com", timeout=60000) page.wait_for_selector("h1")

元素交互：

page.fill("#search", "Playwright") page.click("#submit")

截图与 PDF 生成：

page.screenshot(path="screenshot.png") page.pdf(path="page.pdf")

调试技巧

启用慢动作模式观察操作：

browser = p.chromium.launch(headless=False, slow_mo=1000)

打开开发者工具：

browser = p.chromium.launch(devtools=True)

注意事项

• 默认情况下浏览器以无头模式运行，调试时可设置headless=False
• 跨浏览器支持需分别调用p.chromium、p.firefox或p.webkit
• 异步 API 需配合asyncio使用，适合高性能爬虫场景