硒find_element_by_xpath返回NoSuchElementException

Question

I'm working with selenium but im having problems with the find_element_by_xpath method. Having this tag from the https://citizenportal.rld.state.nm.us/default.aspx website:

<a title="Permits" href="javascript:void(0);" module="Permits">Permits</a>

Im trying to create a click event to click on the permits tag by doing:

from selenium import webdriver
from selenium.webdriver.common.keys import Keys
from selenium.webdriver.common.by import By

driver = webdriver.Chrome()
driver.get('https://citizenportal.rld.state.nm.us/default.aspx')

driver.find_element_by_xpath('//a[@title="Permits"]').click()

However im getting this error and i cant figure it out

---------------------------------------------------------------------------
NoSuchElementException                    Traceback (most recent call last)
<ipython-input-25-ecbedf623e4f> in <module>()
      6 driver.get('https://citizenportal.rld.state.nm.us/default.aspx')
      7 
----> 8 driver.find_element_by_xpath('//a[@title="Permits"]').click()
      9 

C:\Anaconda\lib\site-packages\selenium\webdriver\remote\webdriver.pyc in find_element_by_xpath(self, xpath)
    304             driver.find_element_by_xpath('//div/td[1]')
    305         """
--> 306         return self.find_element(by=By.XPATH, value=xpath)
    307 
    308     def find_elements_by_xpath(self, xpath):

C:\Anaconda\lib\site-packages\selenium\webdriver\remote\webdriver.pyc in find_element(self, by, value)
    782         return self.execute(Command.FIND_ELEMENT, {
    783             'using': by,
--> 784             'value': value})['value']
    785 
    786     def find_elements(self, by=By.ID, value=None):

C:\Anaconda\lib\site-packages\selenium\webdriver\remote\webdriver.pyc in execute(self, driver_command, params)
    247         response = self.command_executor.execute(driver_command, params)
    248         if response:
--> 249             self.error_handler.check_response(response)
    250             response['value'] = self._unwrap_value(
    251                 response.get('value', None))

C:\Anaconda\lib\site-packages\selenium\webdriver\remote\errorhandler.pyc in check_response(self, response)
    191         elif exception_class == UnexpectedAlertPresentException and 'alert' in value:
    192             raise exception_class(message, screen, stacktrace, value['alert'].get('text'))
--> 193         raise exception_class(message, screen, stacktrace)
    194 
    195     def _value_or_default(self, obj, key, default):

NoSuchElementException: Message: no such element: Unable to locate element: {"method":"xpath","selector":"//a[@title="Permits"]"}
  (Session info: chrome=57.0.2987.133)
  (Driver info: chromedriver=2.29.461591 (62ebf098771772160f391d75e589dc567915b233),platform=Windows NT 6.3.9600 x86_64)

I've tried different combinations but it keeps returning an error. What am i doing wrong?

EDIT that includes the hole span and its elements.

<span style="display:inline-block;" id="span_tab_1">                       
    <table role="presentation" tag="navbar" border="0" cellspacing="0" cellpadding="0" class="tab_bar_table ACA_Nowrap">                           
        <tbody>
            <tr>
                <td class="ACA_ItemLeft ACA_LeftOff"></td>                                  
                <div>                                           
                    <a title="Permits" href="javascript:void(0);" module="Permits">Permits</a>                                       
                </div>
                <td class="ACA_ItemCenter ACA_ItemCenter_FontSize ACA_CenterOff">   
                </td>                                   
                <td class="ACA_ItemRight ACA_RightOff"></td>                           
        </tr>                       
 <      /tbody>
    </table>                    
 </span>

Answer 1

Your XPath is fine. I prefer to use CSS selectors, eg "a[title='Permit']" , since they are faster and better supported.

The problem is that the element you want is inside an IFRAME.

<iframe id="ACAFrame" name="ACAFrame" ... src="/Welcome.aspx">

You will need to switch into that frame and then your find will work.

See this page for more details.

Answer 2

Anchor tags do not have a standard title attribute: https://www.w3schools.com/tags/tag_a.asp

I suggest using:

driver.find_element_by_link_text('Permits').click()

per: http://selenium-python.readthedocs.io/locating-elements.html#locating-hyperlinks-by-link-text

Answer 3

Whenever you try searching for the elements within the iframe you must have to switch the focus to the iframe that you are dealing with.

Do this before searching for the elements within the iframe:

driver.switchTo().frame(driver.findElement(By.name("iframeTitle")));

In this case, the iframe Title is : ACAFrame

below is the updated code:

driver = webdriver.Chrome()
driver.get('https://citizenportal.rld.state.nm.us/default.aspx')
driver.switchTo().frame(driver.findElement(By.name('ACAFrame')));
driver.find_element_by_xpath('//a[@title="Permits"]').click()