Python/Selenium“悬停并单击”不适用于类在悬停时更改的WebElement

Question

按钮的“class”在悬停时发生变化，所以我使用ActionChains移动到元素并单击它（我还使用sleep为浏览器加载页面提供了足够的时间）。Python没有抛出任何异常，但单击不起作用（即日历没有向后移动）。

下面我提供了提到的网站和我用一个例子写的代码。你知道为什么会发生这种情况和/或我该如何克服这个问题吗？非常非常感谢。

网址=https://burocomercial.profeco.gob.mx/index.jsp

代码：

from selenium import webdriver
from selenium.webdriver.common.action_chains import ActionChains
import time

driver = webdriver.Chrome(path_to_webdriver)
driver.get('https://burocomercial.profeco.gob.mx/index.jsp') #access website

# Search bar and search button
search_bar = driver.find_elements_by_xpath('//*[@id="txtbuscar"]')
search_button = driver.find_element_by_xpath('//*[@id="contenido"]/div[2]/div[2]/div[2]/div/div[2]/div/button')

# Perform search
search_bar[0].send_keys("inmobiliaria")
search_button.click()

# Select result
time.sleep(2)
xpath='//*[@id="resultados"]/div[4]/table/tbody/tr[1]/td[5]/button'
driver.find_elements_by_xpath(xpath)[0].click()

# Open calendar    
time.sleep(5)
driver.find_element_by_xpath('//*[@id="calI"]').click() #opens calendar
time.sleep(2)

# Hover-and-click on "<" (Here's the problem!!!)
cal_button=driver.find_element_by_xpath('//div[@id="ui-datepicker-div"]/div/a') 
time.sleep(4)
ActionChains(driver).move_to_element(cal_button).perform() #hover
prev_button = driver.find_element_by_class_name('ui-datepicker-prev') #catch element whose class was changed by the hover
ActionChains(driver).click(prev_button).perform() #click
time.sleep(1)
print('clicked on it a second ago. No exception was raised, but the click was not performed')
time.sleep(1) 

Answer 1

您不需要悬停<，只需单击它。

from selenium import webdriver
from selenium.webdriver.support import expected_conditions as EC

driver = webdriver.Chrome(path_to_webdriver)
driver.get('https://burocomercial.profeco.gob.mx/index.jsp') #access website

# set up wait
wait = WebDriverWait(driver, 10)

# Perform search
driver.find_element_by_id('txtbuscar').send_keys("inmobiliaria")
driver.find_element_by_css_selector('button[alt="buscar"]').click()

# Select result
xpath='//*[@id="resultados"]/div[4]/table/tbody/tr[1]/td[5]/button'
wait.until(EC.element_to_be_clickable((By.XPATH, xpath))).click()

# Open calendar    
wait.until(EC.element_to_be_clickable((By.ID, 'calI'))).click() #opens calendar
wait.until(EC.element_to_be_visible((By.ID, 'ui-datepicker-div'))

# Click on "<"
wait.until(EC.element_to_be_clickable((By.CSS_SELECTOR, 'a[title="Ant"]'))).click()

几件事

>

如果XPath仅由ID组成，只需使用.find_element_by_id()。更快更易读。