python palywright庫基本使用
阿新 • • 發佈:2021-01-21
開源方:微軟
安裝:pip install playwright;python -m playwright install
特點:自動化指令碼錄製;有同步、非同步api
生成程式碼指令:python -m playwright codegen
其他:需要Python 3.7及以上;官方api為node版本,python版本待補充
同步:關鍵字為: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) # 預設無頭,這樣為有頭模式 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=百度熱榜") page.screenshot(path=f'example-{browser_type.name}.png') sleep(5) browser.close()
非同步:關鍵字為: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.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=百度熱榜") await page.screenshot(path=f'example-{browser_type.name}.png') await browser.close() asyncio.get_event_loop().run_until_complete(main())
整合 pytest 測試
@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")
執行 JS 程式碼
from playwright import sync_playwright with 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()
中斷網路請求
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_()
記錄並繼續所有網路請求
page.route('**',lambda route,request: log_and_continue_request(route,request)) page.goto('http://todomvc.com') browser.close()
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