xpath方法硒不工作的谷歌chrome

Question

我没有很多硒的经验，但我正试图运行一个代码，在HTML中搜索一个元素与chromedriver。我一直得到如下错误。我想确认的第一件事是，这个错误不能由于与Chromedriver连接到web，而是因为python脚本在HTML代码中搜索的方式。如有任何帮助，不胜感激。

错误:

('no such element: Unable to locate element: {"method":"xpath","selector":"//*[contains(text(),'Find exited companies announced')]/../.."}n  (Session info: headless chrome=91.0.4472.101)', None, None)

代码来源:

<div id="logon-brownContent" style="width:100%;display:true;;padding-bottom: 0px;" class="hideforprinting">
<table width="" cellpadding="0" cellspacing="0" class="">
</table>
</div>
</div>
</td></tr></table>
</div>
</td>
<td class="homepage_mainbody-headlines">
<table class="framework_standard">
<tr>
<td colspan="2" valign="top">
<form action="exitbroker.asp?" method="post" name="oz" id="oz" sumbit="javascript:return validate();">
<input type="hidden" name="verb" value="8" />
<input type="hidden" name="dateformat" value="dd/mm/yyyy" />
<input type="hidden" name="contextid" value="1032390856" />
<input type="hidden" name="statecodelength" value="0" />
<table cellspacing="0" cellpadding="0"  border="0">
<tr>
<td>
<table>
<tr>
<td class="framework_page-title">
<span class="framework_page-title">PE Exit Companies: Search</span><br/>                            
</td>
</tr>   
</table>
</td>
</tr>
<tr>
<td height="1"><img src="/images/spacer.gif" height="13" width="1"></td>
</tr>
</table>            
<table class="criteriaborder"  cellspacing="0" cellpadding="2" width="100%" border="0">
<tbody>
<tr>
<td>
<table cellspacing="0" cellpadding="0" border="0" style="width:100%;">
<tbody>             
<tr>
<td valign="top">
<table cellspacing="0" cellpadding="0" width="100%" border="0">
<tr>
<td align="center" valign="middle" width="100%" height="18" class="criteriaheader2">Exits</td>
</tr>   
</table>
</td>
</tr>
<tr>
<td class="criteriasectionheader"><br />Exit Types</td>
</tr>
<tr>
<td>
<table border="0" cellpadding="0" cellspacing="0">
<tr valign="top"><td width="200"><input  type="checkbox" name="exitdealtype" value="ipo"/>Initial Public Offering</td><td width="200"><input  type="checkbox" name="exitdealtype" value="sbo"/>Secondary Buyout</td><td width="200"><input  type="checkbox" name="exitdealtype" value="tradesale"/>Trade Sale</td></tr>
</table>
</td>
</tr>       

<tr>
<td class="criteriasectionheader"><br />Date Range</td>
</tr>
<tr>
<td>
Find exited companies announced<br><br>
</td>
</tr>           
<tr>
<td>
<table cellpadding="2" cellspacing="0" border="0">

<tr>
<td>From &nbsp;&nbsp;&nbsp;</td>
<td><input type="text"  name="datefrom" style="width:100" value=""></td>
<td>&nbsp;&nbsp;&nbsp; To &nbsp;&nbsp;&nbsp;</td>
<td><input type="text"  name="dateto" style="width:100" value=""></td>
<td>&nbsp;<a href="javascript:removeMe(document.oz.datefrom);removeMe(document.oz.dateto);">Clear Date</a></td>
</tr>
<tr>
<td>&nbsp;</td>
<td><span class="hint">(dd/mm/yyyy)</span></td>
<td>&nbsp;</td>
<td><span class="hint">(dd/mm/yyyy)</span></td>
<td>&nbsp;</td>
</tr>
</table>
</td>
</tr>
<tr>
<td>
<br />
Please Note: The default start date for our searches has been changed to 01/01/2005. You can still access all 
<br />
of our historical data by inserting the desired start date above. For help or further information please contact 
<br />
your Customer Relationship Consultant.
<br />
</td>
</tr>
<tr>
<td class="criteriasectionheader"><br />Industry</td>
</tr>
<tr>
<td>
Find exited companies in these sectors.
<br />The industries defined here are affiliated with both the core business and divisions of the portfolio/exited companies.
<br />Multiple select using ctrl and click. The default is set to all.<br><br>
</td>
</tr>

<tr>
<td>
<table border="0" cellspacing="0" cellpadding="0">
<tr>
<td><span class="criterialabel">Sectors<a href="javascript:displaySectorGlossary('../includes/glossary');"><img src="/includes/images/mm-info-icon.gif"></a></span></td>
<td><span class="criterialabel">Sub-Sectors</span></td>
</tr>
<tr>
<td><select multiple="multiple" size="6" name="sectorcode" style="width:250px" onChange="javascript:emptyListBox(document.oz.subsectorcode);fillSelect(document.oz.subsectorcode,null,buildSelectedItems(document.oz.sectorcode));"></select> </td>
<td><select multiple="multiple" size="6" name="subsectorcode" style="width:250px"></select> </td>
</tr>
<tr>
<td><a name="selectAllSubsectorLink" href="javascript:fillSelect(document.oz.subsectorcode,null,buildSelectedItems(document.oz.sectorcode));selectAll(document.oz.sectorcode);fillSelect(document.oz.subsectorcode,null,buildSelectedItems(document.oz.sectorcode));">Select All Sectors</a> </td>
<td><a href="javascript:if(!document.oz.domsectoronly.checked){selectAll(document.oz.subsectorcode)};">Select All Sub-Sectors</a> </td>
</tr>
<tr>
<td><a href="javascript:emptyListBox(document.oz.subsectorcode);deselectAll(document.oz.sectorcode);">Clear All</a><br><br></td>                                
</tr>
<tr>
<td colspan="4">
<input type="hidden" name="normalsectorsearch" value="" />
<input type="hidden" name="normalsubsectorsearch" value="" />
<input type="checkbox" name="domsectoronly" value="true"  onclick="javascript:deselectAll(document.oz.subsectorcode);setItemDisableStatus(document.oz.subsectorcode);setItemDisableStatus(document.oz.selectAllSubsectorLink);">Search by dominant sector only<a href="javascript:displayPEPortfolioDominantSectorCountryGlossary('../includes/glossary');"><img src="/includes/images/mm-info-icon.gif" title="More information" />
</td>
</tr>
</table>
</td>    
<!--
<td><select size="6" multiple="multiple" name="sectorcode" style="width:250px" ></select> </td>
</tr>
<tr>
<td>
<a href="javascript:selectAll(document.oz.sectorcode);">Select All</a> 
<a href="javascript:deselectAll(document.oz.sectorcode);">Clear All</a>
</td>
</tr>
-->
</tr>    
<tr>
<td style="TEXT-ALIGN: right;" class="search_buttons_right">
<input type="button" value="Save Search" class="framework_flatbutton" onclick="javascript:if (validatePage(document.oz)) {document.oz.verb.value=1;document.oz.target='_self';document.oz.submit();};"/>            
<!-- a onmouseover="style.cursor = 'hand'" onclick="javascript:if (validatePage(document.oz)) {document.oz.verb.value=28;defaultDatesWithLocale( document.oz.datefrom, document.oz.dateto, 'dd/mm/yyyy' );if (verifyDateSubSectors(document.oz.datefrom.value)) {countWindow();document.oz.target='_self';document.oz.submit();}}"><img src="/images/button_countresults.gif" border="0" /></a -->
<input type="button" value="Count Results" class="framework_flatbutton" onclick="javascript:submitCount();" />

<!-- a onmouseover="style.cursor = 'hand'" onclick="javascript:if (validatePage(document.oz)) {document.oz.verb.value=8;defaultDatesWithLocale( document.oz.datefrom,document.oz.dateto, 'dd/mm/yyyy' );document.oz.target='_self';if (verifyDateSubSectors(document.oz.datefrom.value)) {document.oz.target='_self';document.oz.submit();}};"><img src="/images/button_search.gif" border="0" /></a -->
<input type="button" value="Search" class="framework_flatbutton" onclick="javascript:if (validatePage(document.oz)) {
                                       document.oz.verb.value=8
                                      ;document.oz.target='_self'
                                       defaultDatesWithLocale( document.oz.datefrom,document.oz.dateto, 'dd/mm/yyyy' );
                                      ; document.oz.target='_self';
                                      document.oz.submit();
                                      }" />
</td>
</tr>
</tbody>
</table>
</tr>
</td>
</tbody>
</table>    
<table>
<tr>
<td>
<br>
</td>
</tr>
</table>
<table class="criteriaborder"  cellspacing="0" cellpadding="2" width="100%" border="0">
<tbody>
<tr>
<td>
<table cellspacing="0" cellpadding="0" border="0" style="width:100%;">
<tbody>                     
<tr>
<td valign="top">
<table cellspacing="0" cellpadding="0" width="100%" border="0">
<tr>
<td align="center" valign="middle" width="100%" height="18" class="criteriaheader2">Further Search Criteria</td>
</tr>   
</table>
</td>
</tr>
<tr>
<td class="criteriasectionheader"><br/>Geography</td>
</tr>
<tr>
<td>Find exited companies in these locations.
<br />Multiple select using ctrl and click. The default is set to all. </td>
</tr>
<tr>
<td>
<table border="0" cellspacing="0" cellpadding="0">
<tr>
<td>&nbsp;</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<td><img src="/images/spacer.gif" width="10" height="1" alt="" /></td><td>&nbsp;</td>
</tr>
<tr>
<td><select multiple="multiple" size="6" name="areacode" style="width:200px" onChange="javascript:emptyListBox(document.oz.regioncode);emptyListBox(document.oz.countrycode);fillSelect(document.oz.regioncode,null,buildSelectedItems(document.oz.areacode));emptyListBox(document.oz.statecode);"></select></td>
<td><select multiple="multiple" size="6" name="regioncode" style="width:200px" onChange="javascript:emptyListBox(document.oz.countrycode);fillSelect(document.oz.countrycode,null,buildSelectedItems(document.oz.regioncode));emptyListBox(document.oz.statecode);"></select></td>
<td><select multiple="multiple" size="6" name="countrycode" style="width:200px" onChange="javascript:emptyListBox(document.oz.statecode);fillSelect(document.oz.statecode,null,buildSelectedItems(document.oz.countrycode));"></select></td>
<td>&nbsp;</td><td><select multiple="multiple" size="6" name="statecode" style="width:200px"></select></td>                                                 
</tr>
<tr>
<td><a href="javascript:emptyListBox(document.oz.regioncode);emptyListBox(document.oz.countrycode);selectAll(document.oz.areacode);fillSelect(document.oz.regioncode,null,buildSelectedItems(document.oz.areacode));">Select All</a></td>
<td><a href="javascript:emptyListBox(document.oz.countrycode);selectAll(document.oz.regioncode);fillSelect(document.oz.countrycode,null,buildSelectedItems(document.oz.regioncode));">Select All</a></td>
<td><a href="javascript:selectAll(document.oz.countrycode);emptyListBox(document.oz.statecode);fillSelect(document.oz.statecode,null,buildSelectedItems(document.oz.countrycode));">Select All</a></td>
<td>&nbsp;</td><td><a href="javascript:selectAll(document.oz.statecode);">Select All</a></td>
</tr>                                               
<tr>
<td><a href="javascript:emptyListBox(document.oz.regioncode);emptyListBox(document.oz.countrycode);emptyListBox(document.oz.statecode);deselectAll(document.oz.areacode);">Clear All</a></td>                                               
</tr>                                                                                                                                                   
</table>
</td>
</tr>
<tr>
<td class="criteriasectionheader"><br/>PE House</td>
</tr>
<tr>
<td>Find exit companies who are currently held by specific PE Houses.
<br />Maximum of 50 selections allowed.</td >
</tr>
<tr>
<td>
<table border="0" cellspacing="0" cellpadding="0">
<tr>
<td>
<a class="search_lookup" href="javascript:openWin('qpehousenotapproved','hyperlink','pehousesysid','select-multiple','pehousesysiddescription','');">Lookup</a>
</td>
</tr>
<tr>
<td>
<select size="4" multiple="multiple" name="pehousesysid" style="width:350px"></select>                          
<input type="hidden" name="pehousesysiddescription"  />
</td>   
</tr>
<tr>
<td>
<a href="javascript:removeLookupOption(document.oz.pehousesysid);removeMe(document.oz.pehousesysid);">Remove</a>
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td class="criteriasectionheader"><br/>Advisors</td>
</tr>
<tr>
<td>
Find exited companies who have been advised by these companies.
<br />Maximum of 50 selections allowed.
</td>
</tr>
<tr>
<td>
<table border="0" cellspacing="0" cellpadding="0">
<tr>
<td>
<a class="search_lookup" href="javascript:openWin('ecadvisor','hyperlink','advisorcompanysysid','select-multiple','advisorcompanysysiddescription','');">Lookup</a>
</td>
</tr>
<tr>
<td>
<select size="4" multiple="multiple" name="advisorcompanysysid" style="width:350px"></select>
<input type="hidden" name="advisorcompanysysiddescription" />
</td>                                               
</tr>
<tr>
<td>
<a href="javascript:removeLookupOption(document.oz.advisorcompanysysid);removeMe(document.oz.advisorcompanysysid);">Remove</a>
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td><br /><span class="criteriasectionheader">Deal Value</span></td>
</tr>
<tr>
<td>Find exited companies with the following deal value. </td>
</tr>
<tr>
<td>
<table>
<tr>
<td><p><span class="criterialabel">Currency</span></p></td> 
<td>&nbsp;</td>
<td><select id="currencycode" name="currencycode"><option value="AUD">AUD</option>
<option value="CHF">CHF</option>
<option value="CNY">CNY</option>
<option value="EUR">EUR</option>
<option value="GBP">GBP</option>
<option value="HKD">HKD</option>
<option value="INR">INR</option>
<option value="JPY">JPY</option>
<option value="USD" selected="">USD</option></select></td>
</tr>
</table>
</td>
</tr>
<tr>
<td>
<table>
<tr>
<td width="180"><p><span class="criterialabel">Minimum value in millions</span></p></td>
<td>&nbsp;</td> 
<td><p><input type="text" name="mindealvalue" size="12" value="" onkeypress="checkMinimumValue();" onkeyup="checkMinimumValue();" /></td>
</tr>
</table>
</td>
</tr>
<tr>
<td>
<table>
<tr>
<td width="180"><span class="criterialabel">Maximum value in millions</span></td>   
<td>&nbsp;</td>
<td><input type="text" name="maxdealvalue" size="12" value=""></td>
</tr>
</table>
</td>
</tr>       
<tr><td><br>Include deals with undisclosed value <input type="checkbox" name="undiscloseddealvalues" value="true" Checked></td></tr>
<tr>
<td class="criteriasectionheader"><br/>Exited Companies</td>
</tr>
<tr>
<td>Maximum of 50 selections allowed.</td >
</tr>
<tr>
<td>
<table border="0" cellspacing="0" cellpadding="0">
<tr>
<td>
<a class="search_lookup" href="javascript:openWin('eccompany','hyperlink','eccompanysysid','select-multiple','eccompanysysiddescription','');">Lookup</a>
</td>
</tr>
<tr>
<td>
<select size="4" multiple="multiple" name="eccompanysysid" style="width:350px"></select>
<input type="hidden" name="eccompanysysiddescription"  />
</td>
</tr>
<tr>
<td>
<a href="javascript:removeLookupOption(document.oz.eccompanysysid);removeMe(document.oz.eccompanysysid);">Remove</a>
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td class="criteriasectionheader"><br/>Free Text Search</td>
</tr>
<tr>
<td>Please use the Free Text Search by typing in a keyword or phrase to identify the required portfolio.
<br />
<span class="hint">Searches on companies' information, deal description, and condition, type, nature, consideration structure.<br><br></span>
</td>
</tr>
<tr>
<td>
<table border="0" cellspacing="0" cellpadding="0">
<tr>
<td width="150" class="criterialabel">Search</td>
<td><input type="text" name="textsearch" style="width:250px" value="" /></td>
<td><table border="0" cellpadding="0" cellspacing="0">
<tr valign="top"><td width="350"><input checked type="radio" name="andorfreetext" value="and"/>Match all words<br><input  type="radio" name="andorfreetext" value="or"/>Match any word<br><input  type="radio" name="andorfreetext" value="phrase"/>Match exact phrase</td></tr>
</table>
</td>
</tr>

</table>
</td>
</tr>               

<tr>
<td style="TEXT-ALIGN: right;" class="search_buttons_right">
<input type="button" value="Save Search" class="framework_flatbutton" onclick="javascript:if (validatePage(document.oz)) {document.oz.verb.value=1;document.oz.target='_self';document.oz.submit();};"/>            
<!-- a onmouseover="style.cursor = 'hand'" onclick="javascript:if (validatePage(document.oz)) {document.oz.verb.value=28;defaultDatesWithLocale( document.oz.datefrom, document.oz.dateto, 'dd/mm/yyyy' );if (verifyDateSubSectors(document.oz.datefrom.value)) {countWindow();document.oz.target='_self';document.oz.submit();}}"><img src="/images/button_countresults.gif" border="0" /></a -->
<input type="button" value="Count Results" class="framework_flatbutton" onclick="javascript:submitCount();" />

<!-- a onmouseover="style.cursor = 'hand'" onclick="javascript:if (validatePage(document.oz)) {document.oz.verb.value=8;defaultDatesWithLocale( document.oz.datefrom,document.oz.dateto, 'dd/mm/yyyy' );document.oz.target='_self';if (verifyDateSubSectors(document.oz.datefrom.value)) {document.oz.target='_self';document.oz.submit();}};"><img src="/images/button_search.gif" border="0" /></a -->
<input type="button" value="Search" class="framework_flatbutton" onclick="javascript:if (validatePage(document.oz)) {
                                       document.oz.verb.value=8
                                      ;document.oz.target='_self'; 
                                       defaultDatesWithLocale( document.oz.datefrom,document.oz.dateto, 'dd/mm/yyyy' );
                                      document.oz.target='_self';
                                      document.oz.submit();
                                      }" />
</td>
</tr>
</tbody>
</table>
</tr>
</td>
</tbody>            
</table>        
</form>      

<script LANGUAGE="JavaScript">
<!--

function validatePage(objitem) {

selectAll(objitem.pehousesysid);
selectAll(objitem.eccompanysysid);
objitem.eccompanysysid.required=false;
objitem.eccompanysysid.description='Portfolio Company Name';
objitem.eccompanysysid.datatype='alphanumeric';
selectAll(objitem.advisorcompanysysid);
objitem.advisorcompanysysid.required=false;
objitem.advisorcompanysysid.description='Advisor Name';
objitem.advisorcompanysysid.datatype='alphanumeric';    

// locale info.
objitem.localedateformat='dd/mm/yyyy';
objitem.localecurrencycode='USD';
objitem.localelanguagecode='en_eu';
objitem.localetimezone='235';


objitem.mindealvalue.required=false;
objitem.mindealvalue.description='Currency minimum value in millions';
objitem.mindealvalue.datatype='decimal';
objitem.mindealvalue.min =0;
objitem.mindealvalue.max=1000000000000000000;
objitem.maxdealvalue.required=false;
objitem.maxdealvalue.description='Currency maximum value in millions';
objitem.maxdealvalue.datatype='decimal';
objitem.maxdealvalue.min=0;
objitem.maxdealvalue.max=1000000000000000000;
objitem.datefrom.required=false;
objitem.datefrom.description='Date from';
objitem.datefrom.datatype='date';
objitem.dateto.required=false;
objitem.dateto.description='Date to';
objitem.dateto.datatype='date';

if (objitem.statecode)
{
objitem.statecodelength.value = objitem.statecode.length;
}       

// DanielC: 7/11/08: Case 107136: set the hidden field so that it will end up in the token XML and can be used in criteria.xml
if (document.oz.domsectoronly.checked == false)
{
document.oz.normalsectorsearch.value = "true";
document.oz.normalsubsectorsearch.value = "true";
}

return verify(objitem,false);
}


function submitCount()
{
if (validatePage(document.oz)) {
var dOz = document.oz;
//need to change pPopup variable to pPopup=1 to ensure no chrome on popup in event of failure
var vAction = dOz.action;
dOz.action = (dOz.action.search(/pPopup/) == -1) ? dOz.action+= "&pPopup=1" : dOz.action.replace(/pPopup=./,"pPopup=1");    
defaultDatesWithLocale( document.oz.datefrom,document.oz.dateto, 'dd/mm/yyyy' );
dOz.verb.value=28;
countWindow();
document.oz.submit();
dOz.action = vAction;
}
} 

//-->
</script>
</td>
</tr>
</table>
</td>
<td class="homepage_mainbody-leaguetbl"></td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="100%"><img src="/images/spacer.gif" width="1" height="1"></td>
</tr>
</table>
</td>
</tr>
</table>
</div><footer class="acuris-footer" xmlns:msxsl="urn:schemas

一段xpath不发送错误的代码:

def openSearchPageCommon(self,url,clear_xpath) :
self.drv.get(url)
for x in self.drv.find_elements_by_xpath(clear_xpath) :
x.click()

def openSearchPage(self) :
xpath = "//form[@action='portfoliobroker.asp?']//table//*[contains(text(),'Clear Date')]"
self.openSearchPageCommon(self.tgt,xpath)

完全错误:

Traceback (most recent call last):
File "mmmm_lib.py", line 73, in __init__
self.drv.find_element_by_xpath("//*[contains(text(),'Find exited companies announced')]/../..")
File "/home/airflow/.local/lib/python3.6/site-packages/selenium/webdriver/remote/webdriver.py", line 394, in find_element_by_xpath
return self.find_element(by=By.XPATH, value=xpath)
File "/home/airflow/.local/lib/python3.6/site-packages/selenium/webdriver/remote/webdriver.py", line 978, in find_element
'value': value})['value']
File "/home/airflow/.local/lib/python3.6/site-packages/selenium/webdriver/remote/webdriver.py", line 321, in execute
self.error_handler.check_response(response)
File "/home/airflow/.local/lib/python3.6/site-packages/selenium/webdriver/remote/errorhandler.py", line 242, in check_response
raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.NoSuchElementException: Message: no such element: Unable to locate element: {"method":"xpath","selector":"//*[contains(text(),'Find exited companies announced')]/../.."}

Answer 1

可能是因为您试图定位的元素在iframe或shadow dom中。并且确保xpath只指向Dom中的一个元素。

如果它在iframe中，您需要切换到该框架，然后尝试定位元素。

如果它在shadow root,open中，您需要首先获得影子根以找到所需的元素。

Answer 2

我认为我们应该尝试下面写的css选择器:-

table.criteriaborder:nth-of-type(2) tr:nth-of-type(5) td

，因为您使用的xpath依赖于一个文本它基本上是一个文本节点

如果你正在处理python，你可以尝试下面的代码:

print(driver.find_element_by_css_selector("table.criteriaborder:nth-of-type(2) tr:nth-of-type(5) td").text)