如何运用Python Playwright库实现网页自动化操作？

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开源工具：- 安装方式：`pip install playwright` 或 `python -m playwright install`- 特点：自动化脚本录制；支持同步、异步API；生成代码指令：`python -m playwright codegen`- 其他：需要Python 3.7及以上；官方API支持Node.js版本。

开源方：微软

安装：pip install playwright；python -m playwright install

特点：自动化脚本录制；有同步、异步api

生成代码指令：python -m playwright codegen
其他：需要Python 3.7及以上；官方api为node版本，python版本待补充

同步：关键字为：sync_playwright

from time import sleep from playwright import sync_playwright with sync_playwright() as p: for browser_type in [p.chromium, p.firefox, p.webkit]: browser = browser_type.launch(headless=False) # 默认无头，这样为有头模式 page = browser.newPage() page.goto('baidu.com') page.fill("input[name=\"wd\"]", "AirPython") with page.expect_navigation(): page.press("input[name=\"wd\"]", "Enter") page.waitForSelector("text=百度热榜") page.screenshot(path=f'example-{browser_type.name}.png') sleep(5) browser.close()

异步：关键字为：async_playwright

import asyncio from playwright import async_playwright async def main(): async with async_playwright() as p: for browser_type in [p.chromium, p.firefox, p.webkit]: browser = await browser_type.launch(headless=False) page = await browser.newPage() await page.goto('baidu.com') await page.fill("input[name=\"wd\"]", "AirPython") await page.press("input[name=\"wd\"]", "Enter") await page.waitForSelector("text=百度热榜") await page.screenshot(path=f'example-{browser_type.name}.png') await browser.close() asyncio.get_event_loop().run_until_complete(main())

集成 pytest 测试

@pytest.fixture(scope="session") def test_playwright_is_visible_on_google(page): page.goto("www.google.com") page.type("input[name=q]", "Playwright GitHub") page.click("input[type=submit]") page.waitForSelector("text=microsoft/Playwright")

执行 JS 代码

from playwright import sync_playwright with sync_playwright() as p: browser = p.firefox.launch() page = browser.newPage() page.goto('www.example.com/') dimensions = page.evaluate('''() => { return { width: document.documentElement.clientWidth, height: document.documentElement.clientHeight, deviceScaleFactor: window.devicePixelRatio } }''') print(dimensions) browser.close()

中断网络请求

from playwright import sync_playwright with sync_playwright() as p: browser = p.chromium.launch() page = browser.newPage() def log_and_continue_request(route, request): print(request.url) route.continue_()

记录并继续所有网络请求

page.route('**', lambda route, request: log_and_continue_request(route, request)) page.goto('todomvc.com') browser.close()

以上就是python palywright库基本使用的详细内容，更多关于python palywright库的资料请关注易盾网络其它相关文章！