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

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('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 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('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_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('http://todomvc.com')
browser.close()

来源：https://www.cnblogs.com/teark/p/14267240.html