我尝试单击按钮但收到此错误消息: 我尝试单击的元素确实存在于页面上,但我不确定为什么它说该元素不存在:
Message: no such element: Unable to locate element: {"method":"xpath","selector":"//button[@class="vote_button mfp-voteText"]"}
下面是我的代码:
driver.get('https://trupanion.com/canada/members/contest?pixlee_album_photo_id=427049511')
time.sleep(10)
try:
vote = driver.find_element_by_xpath('//button[@class="vote_button mfp-voteText"]')
vote.click()
except Exception as e:
print(e)
下面是chrome开发工具中的XPath,显示它是正确的:
所需的元素位于
<iframe>
内,因此您必须:
诱导 WebDriverWait 使所需的 框架可用并切换到它。
诱导 WebDriverWait 使所需的元素可点击。
您可以使用以下任一定位器策略:
使用
CSS_SELECTOR
:
driver.get('https://trupanion.com/members/contest?pixlee_album_photo_id=427049511')
WebDriverWait(driver, 10).until(EC.frame_to_be_available_and_switch_to_it((By.CSS_SELECTOR,"iframe#pixlee_lightbox_iframe")))
WebDriverWait(driver, 20).until(EC.element_to_be_clickable((By.CSS_SELECTOR, "button.vote_button.mfp-voteText"))).send_keys("test")
使用
XPATH
:
driver.get("https://trupanion.com/members/contest?pixlee_album_photo_id=427049511")
WebDriverWait(driver, 10).until(EC.frame_to_be_available_and_switch_to_it((By.XPATH,"//iframe[@id='pixlee_lightbox_iframe']")))
WebDriverWait(driver, 20).until(EC.element_to_be_clickable((By.XPATH, "//button[@class='vote_button mfp-voteText']"))).click()
注意:您必须添加以下导入:
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.common.by import By
from selenium.webdriver.support import expected_conditions as EC
浏览器快照:
您可以在以下位置找到一些相关讨论:
尝试在
css selector
函数中使用 XPATH
而不是 WebdriverWait()
。它将等待 X 秒以使元素可单击,并在该元素出现后立即单击它。但是,您需要切换到必须通过 frame
选择器找到的框架。
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
self.webdriver.switch_to_frame(self.webdriver.find_element_by_css_selector('frame'))
try:
WebDriverWait(webdriver,time).until(EC.element_to_be_clickable((By.CSS_SELECTOR,path)))
except Exception as e:
print(e)
它在
<frame>
标签内,先切换它:
driver.get('https://trupanion.com/canada/members/contest?pixlee_album_photo_id=427049511')
time.sleep(10)
try:
#switch it first
driver.switch_to.frame(driver.find_element_by_id('pixlee_lightbox_iframe'))
vote = driver.find_element_by_xpath('//button[@class="vote_button mfp-voteText"]')
vote.click()
except Exception as e:
print(e)
但请注意
time.sleep(..)
是个坏主意。
你可以在这里学习selenium等:
selenium-python.readthedocs.io/waits.html
切换框架:
.frame_to_be_available_and_switch_to_it
虽然你的 xpath 可以工作,但 css 选择器看起来更好:
vote = driver.find_element_by_css_selector('button.vote_button.mfp-voteText')
我只使用了 CSS 选择器,即使它不起作用