python palywright库基本使用

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

from time import sleepfrom playwright import sync_playwrightwith 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(’http://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 asynciofrom playwright import async_playwrightasync 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(’http://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('https://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_playwrightwith sync_playwright() as p: browser = p.firefox.launch() page = browser.newPage() page.goto(’https://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_playwrightwith 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(’http://todomvc.com’)browser.close()

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