问题描述
我正在尝试在工作中自动执行一些任务,这需要从 pingdom 中获取许多页面的页面速度见解。我没有购买高级版的预算,所以我自己写了一个 python 脚本。
我需要点击“北美 - 美国 - 旧金山”,为了让它出现在 HTML 检查器中,我必须先点击 ::after。我如何用 puppeteer 点击它?我了解点击次数,但如何引用 ::after 标签?
尝试修复(我尝试编辑 HTML,但在我的脚本单击按钮后,它恢复到亚洲):
# All this did was switch the HTML and after it clicks the button,the_class = '[class=ng-tns-c3-0]'
element = await page.querySelectorAll(the_class)
title = await page.evaluate('(element) => element.innerText = "north America - USA - San Francisco"',element[3])
await page.screenshot({'path': 'screenshotcorrect.png'})
代码片段:
import asyncio
from pyppeteer import launch
import sys
async def main():
browser = await launch()
page = await browser.newPage()
await page.goto('https://tools.pingdom.com/')
# Fill search field
content = "https://www.howthefork.com/"
await page.type('[id=urlInput]',content)
# ISSUE IS HERE
await page.waitForSelector("::after")
# await page.click('::after')
# All this did was switch the HTML it didn't select north America
#the_class = '[class=ng-tns-c3-0]'
#element = await page.querySelectorAll(the_class)
#title = await page.evaluate('(element) => element.innerText = "north America - USA - San Francisco"',element[3])
#await page.screenshot({'path': 'screenshotcorrect.png'})
# Click 'start test'
button = await page.xpath('/html/body/app-root/main/app-home-hero/header/section/app-test-runner/div/div[2]/div[3]/input')
await button[0].click()
# Wait for right elements to load
await page.waitForXPath('/html/body/app-root/main/app-report/section[1]/app-summary/div/div/app-summary-player/div/div[2]/div/div[1]/app-metric/div[2]')
# Print the score we want
value = '[class=value]'
grade_finder = await page.querySelectorAll(value)
grade = await page.evaluate('(grade_finder) => grade_finder.textContent',grade_finder[0])
print(grade)
# Screenshot and close
await page.screenshot({'path': 'screenshot.png'})
await browser.close()
if __name__ == "__main__":
asyncio.run(main())
解决方法
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