Click on element in dropdown with Selenium and Python

问题

With Selenium and Chrome webdriver on MacOS need to click dropdown element. But always have an error that can't find. Have this html code on a page where it located:

<select id="periodoExtrato" name="periodoExtrato" class="EXTtexto" onchange="enviarExtrato(document.formperiodo.periodoExtrato[document.formperiodo.periodoExtrato.selectedIndex].value);">
<!--<option value="01" >&Uacute;ltimo dia</option>-->
<option value="03" selected="true">Últimos 3 dias</option>
<option value="05">Últimos 5 dias</option>
<option value="07">Últimos 7 dias</option>
<option value="15">Últimos 15 dias</option>
<option value="30">Últimos 30 dias</option>
<option value="X">Data específica (até 60 dias)</option>
<option value="D">Mês completo (desde 2002)</option>
</select>

I need to choose Últimos 15 dias, so i have this code:

self.driver.find_element_by_xpath('//[@id="periodoExtrato"]/option[4]').click()

But have an error:

Traceback (most recent call last):
  File "olxscrape.py", line 120, in <module>
    main()
  File "olxscrape.py", line 117, in main
    b = Bot()
  File "olxscrape.py", line 12, in __init__
    self.navigate()
  File "olxscrape.py", line 106, in navigate
    self.driver.find_element_by_xpath('//*[@id="periodoExtrato"]/option[4]').click()
  File "/Users/Lutchenko/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/selenium/webdriver/remote/webdriver.py", line 293, in find_element_by_xpath
    return self.find_element(by=By.XPATH, value=xpath)
  File "/Users/Lutchenko/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/selenium/webdriver/remote/webdriver.py", line 752, in find_element
    'value': value})['value']
  File "/Users/Lutchenko/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/selenium/webdriver/remote/webdriver.py", line 236, in execute
    self.error_handler.check_response(response)
  File "/Users/Lutchenko/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/selenium/webdriver/remote/errorhandler.py", line 192, in check_response
    raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.NoSuchElementException: Message: no such element: Unable to locate element: {"method":"xpath","selector":"//*[@id="periodoExtrato"]/option[4]"}
  (Session info: chrome=55.0.2883.95)
  (Driver info: chromedriver=2.27.440174 (e97a722caafc2d3a8b807ee115bfb307f7d2cfd9),platform=Mac OS X 10.12.2 x86_64)

回答1:

I would suggest not using xpath here. Try, instead, something like this:

 select = Select(self.driver.find_element_by_id('periodoExtrato'))
 option_indexes = range(1, len(select.options))
 for index in option_indexes:
    select.select_by_index(index)
    ......

回答2:

A problem is that element goes after </head> in <frameset>, so selenium can't find it. After adding this string problem solved.

browser.switch_to_frame('name')

And after that

self.driver.find_element_by_xpath('//[@id="periodoExtrato"]/option[4]').click()

来源：https://stackoverflow.com/questions/41602539/click-on-element-in-dropdown-with-selenium-and-python

标签

python

screen-scraping