折腾：
【未解决】Mac中用puppeteer自动操作浏览器实现百度搜索
期间，已经可以用pyppeteer去触发百度搜索了，现在去看看如何提取搜索结果。
先去搞清楚，如何匹配元素
对于
【整理】用Chrome或Chromium查看百度首页中各元素的html源码
其中的元素：
<h3 class="t"><a data-click="{
'F':'778317EA',
'F1':'9D73F1E4',
'F2':'4CA6DE6B',
'F3':'54E5243F',
'T':'1616767238',
'y':'EFBCEFBE'
}" href="https://www.baidu.com/link?url=nDSbU9I2MSInD6Tq7Je06wZD-CiTQ-ckokscP4kiXneJcS0UWUPIqWHMjLDyn5uW&wd=&eqid=919e8ff000236bc300000004605de906" target="_blank"><em>crifan</em> (<em>Crifan</em> Li) · GitHub</a></h3>去看看如何写selector去匹配元素
h3ASelector = "h3[class^='t'] a"
aElemList = await page.querySelectorAll(h3ASelector)
print("aElemList=%s" % aElemList)可以解析到：
继续研究。
再去搞清楚，如何提取元素的值
puppeteer extract text
刚注意官网
竟然就是：
element = await page.querySelector('h1')
title = await page.evaluate('(element) => element.textContent', element)可以用
# elements = await page.xpath('//div[@class="title-box"]/a')
elements = await page.querySelectorAll(".title-box a")
for item in elements:
print(await item.getProperty('textContent'))
# <pyppeteer.execution_context.JSHandle object at 0x000002220E7FE518>
# 获取文本
title_str = await (await item.getProperty('textContent')).jsonValue()
# 获取链接
title_link = await (await item.getProperty('href')).jsonValue()继续写代码
searchResultANum = len(searchResultAList)
print("searchResultANum=%s" % searchResultANum)
for curIdx, aElem in enumerate(searchResultAList):
curNum = curIdx + 1
print("%s [%d] %s" % ("-"*20, curNum, "-"*20))
aTextJSHandle = await aElem.getProperty('textContent')
print("type(aTextJSHandle)=%s" % type(aTextJSHandle))
print("aTextJSHandle=%s" % aTextJSHandle)
title = await aTextJSHandle.jsonValue()
print("type(title)=%s" % type(title))
print("title=%s" % title)
baiduLinkUrl = await (await aElem.getProperty("href")).jsonValue()
print("baiduLinkUrl=%s" % baiduLinkUrl)调试，结果：
【已解决】pyppeteer中page.querySelectorAll运行时无法获取到结果
然后代码
resultASelector = "h3[class^='t'] a"
searchResultAList = await page.querySelectorAll(resultASelector)
print("searchResultAList=%s" % searchResultAList)
searchResultANum = len(searchResultAList)
print("searchResultANum=%s" % searchResultANum)
for curIdx, aElem in enumerate(searchResultAList):
curNum = curIdx + 1
print("%s [%d] %s" % ("-"*20, curNum, "-"*20))
aTextJSHandle = await aElem.getProperty('textContent')
print("type(aTextJSHandle)=%s" % type(aTextJSHandle))
print("aTextJSHandle=%s" % aTextJSHandle)
title = await aTextJSHandle.jsonValue()
print("type(title)=%s" % type(title))
print("title=%s" % title)
baiduLinkUrl = await (await aElem.getProperty("href")).jsonValue()
print("baiduLinkUrl=%s" % baiduLinkUrl)一次性通过，是正常的：
输出：
searchResultAList=[<pyppeteer.element_handle.ElementHandle object at 0x10309e860>, <pyppeteer.element_handle.ElementHandle object at 0x10309e278>, <pyppeteer.element_handle.ElementHandle object at 0x10309e0f0>, <pyppeteer.element_handle.ElementHandle object at 0x1030b0b00>, <pyppeteer.element_handle.ElementHandle object at 0x1030b0710>, <pyppeteer.element_handle.ElementHandle object at 0x1030b0198>, <pyppeteer.element_handle.ElementHandle object at 0x1030b06d8>, <pyppeteer.element_handle.ElementHandle object at 0x1030b0160>, <pyppeteer.element_handle.ElementHandle object at 0x1030b0ef0>, <pyppeteer.element_handle.ElementHandle object at 0x1030b30b8>] searchResultANum=10 -------------------- [1] -------------------- type(aTextJSHandle)=<class 'pyppeteer.execution_context.JSHandle'> aTextJSHandle=<pyppeteer.execution_context.JSHandle object at 0x10309c9b0> type(title)=<class 'str'> title=在路上on the way - 走别人没走过的路,让别人有路可走 baiduLinkUrl=http://www.baidu.com/link?url=1l0yCSpJcbVYGRoCdaXUal3NIDZXTn9F1Q4XwZcd6KzpAmUVPLca_wIIqFVlaBs6
【总结】
此处最后用：
################################################################################
# Wait page reload complete
################################################################################
SearchFoundWordsSelector = 'span.nums_text'
SearchFoundWordsXpath = "//span[@class='nums_text']"
# await page.waitForSelector(SearchFoundWordsSelector)
# await page.waitFor(SearchFoundWordsSelector)
# await page.waitForXPath(SearchFoundWordsXpath)
# Note: all above exception: 发生异常: ElementHandleError Evaluation failed: TypeError: MutationObserver is not a constructor
# so change to following
# # Method 1: just wait
# await page.waitFor(2000) # millisecond
# Method 2: wait element showing
SingleWaitSeconds = 1
while not await page.querySelector(SearchFoundWordsSelector):
print("Still not found %s, wait %s seconds" % (SearchFoundWordsSelector, SingleWaitSeconds))
await asyncio.sleep(SingleWaitSeconds)
# pass确保页面内容加载完毕。
再用：
################################################################################
# Extract result
################################################################################
resultASelector = "h3[class^='t'] a"
searchResultAList = await page.querySelectorAll(resultASelector)
# print("searchResultAList=%s" % searchResultAList)
searchResultANum = len(searchResultAList)
print("Found %s search result:" % searchResultANum)
for curIdx, aElem in enumerate(searchResultAList):
curNum = curIdx + 1
print("%s [%d] %s" % ("-"*20, curNum, "-"*20))
aTextJSHandle = await aElem.getProperty('textContent')
# print("type(aTextJSHandle)=%s" % type(aTextJSHandle))
# type(aTextJSHandle)=<class 'pyppeteer.execution_context.JSHandle'>
# print("aTextJSHandle=%s" % aTextJSHandle)
# aTextJSHandle=<pyppeteer.execution_context.JSHandle object at 0x10309c9b0>
title = await aTextJSHandle.jsonValue()
# print("type(title)=%s" % type(title))
# type(title)=<class 'str'>
print("title=%s" % title)
baiduLinkUrl = await (await aElem.getProperty("href")).jsonValue()
print("baiduLinkUrl=%s" % baiduLinkUrl)提取出要的结果。
输出：
Found 10 search result: -------------------- [1] -------------------- title=在路上on the way - 走别人没走过的路,让别人有路可走 baiduLinkUrl=http://www.baidu.com/link?url=eGTzEXXlMw-hnvXYSFk8t4VSZPck1dougn7YhfCwBf3ZzGJEHdZYsoAQK-4GBJuP -------------------- [2] -------------------- title=crifan – 在路上 baiduLinkUrl=http://www.baidu.com/link?url=l6jXejlgARrWj34ODgKWZ9BeNKwyYZLRhLb5B8oDFVqNpHoco8a_qbAdD1m-t_cf -------------------- [3] -------------------- title=crifan简介_crifan的专栏-CSDN博客_crifan baiduLinkUrl=http://www.baidu.com/link?url=IIqPM5wuVE_QP7S357-1bJWGGU1kpFcAZ945BaXUQNpaDzXihf_98wAVi05Gk6-8Qu4aGLv2Rv65WJm6Qr5kk_ -------------------- [4] -------------------- title=crifan的微博_微博 baiduLinkUrl=http://www.baidu.com/link?url=NnqeMlu4Jr_Ld-zoui8pbQO4eRMMO9pLd_DHXagqcdZ46NF4CSuyEziKSTpqCNEi -------------------- [5] -------------------- title=Crifan的电子书大全 | crifan.github.io baiduLinkUrl=http://www.baidu.com/link?url=uOZ-AmgNBNr3mGdETezIjTvtedH_ueM6-LNOc2QxbjcNeS8LuVBY-kirwogX7qLl -------------------- [6] -------------------- title=GitHub - crifan/crifanLib: crifan's library baiduLinkUrl=http://www.baidu.com/link?url=t42I1rYfn32DGw9C6cw_5lB-z1worKzEuROOtWj-Jyf1l2IBNBcz-l85hSKv9s9T -------------------- [7] -------------------- title=在路上www.crifan.com - 网站排行榜 baiduLinkUrl=http://www.baidu.com/link?url=WwLwfXA72vK08Obyx2hwqA3-wmq8jAisi4VVSt2R0Ml3ccCy_yxeYfxD2xouAX-i5AyUU1U_2EghwVbJ2p-ipa -------------------- [8] -------------------- title=crifan的专栏_crifan_CSDN博客-crifan领域博主 baiduLinkUrl=http://www.baidu.com/link?url=Cmcn2mXwiZr87FBGQBq85Np0hgGTP_AK2yLUW6GDeA21r7Q5WvUOUjaKZo5Jhb0f -------------------- [9] -------------------- title=User crifan - Stack Overflow baiduLinkUrl=http://www.baidu.com/link?url=yGgsq1z2vNDAAeWY-5VDWbHv7e7zPILHI4GVFPZd6MaFrGjYHsb3Onir1Vi6vvZqD7QAGJrZehIYZpcBfh_Gq_ -------------------- [10] -------------------- title=crifan - Bing 词典 baiduLinkUrl=http://www.baidu.com/link?url=UatxhUBL3T_1ikPco5OazvJaWkVqCeCHh4eoA6AX_lP4t_Bx3GVHlMHZjgu3YAwE
效果：
转载请注明：在路上 » 【已解决】pyppeteer中提取百度搜索结果中的信息