Python Selenium - 可见后“无法定位元素”

Question

我需要你的帮助。我正在尝试使用 Python 2.7 中的 Selenium 从 tripadvisor 抓取一些数据。然而，我在某一点上陷入困境。

浏览到正确的页面后，我尝试按某些价格过滤酒店。为此，您将鼠标悬停或单击“价格”，然后选择适当的值，例如（3 欧元 - 13 欧元）。

点击价格，然后点击价值。我收到错误，该元素不可见或无法定位，但它清晰可见。

代码

from urllib import urlopen
import time
from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC

city = 'nha thrang'


url = 'http://www.tripadvisor.nl/Hotels'

driver = webdriver.Firefox()

# open browser
driver.get(url)
time.sleep(5)

# insert city & dates
driver.find_element_by_id('searchbox').send_keys(city)
driver.find_element_by_id('date_picker_in_188616').click()
driver.find_elements_by_class_name('day')[15].click()
driver.find_element_by_id('date_picker_out_188616').click()
driver.find_elements_by_class_name('day')[16].click()

time.sleep(5)

# click search
driver.find_element_by_id('SUBMIT_HOTELS').click()

# close popup
time.sleep(5)
try:
    driver.switch_to.window(driver.window_handles[1])
    driver.close()
    driver.switch_to.window(driver.window_handles[0])
except:
    ''

# click on 'price'. Works!
driver.find_element_by_xpath('//div[starts-with(@class, "JFY_hotel_filter_icon enabled price sprite-price")]').click()

# click on particular price. doesn't work.
driver.find_element_by_xpath('//div[starts-with(@class, "jfy_tag_style jfy_filter_p_4 jfy_cloud")]').click()

错误

Traceback (most recent call last):
File "<pyshell#30>", line 1, in <module>
driver.find_element_by_xpath('//div[starts-with(@class, "jfy_tag_style jfy_filter_p_4 jfy_cloud")]').click()
File "C:\Python27\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 230, in find_element_by_xpath
return self.find_element(by=By.XPATH, value=xpath)
File "C:\Python27\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 662, in find_element
{'using': by, 'value': value})['value']
File "C:\Python27\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 173, in execute
self.error_handler.check_response(response)
File "C:\Python27\lib\site-packages\selenium\webdriver\remote\errorhandler.py", line 166, in check_response
raise exception_class(message, screen, stacktrace)
NoSuchElementException: Message: Unable to locate element: {"method":"xpath","selector":"//div[starts-with(@class, \"jfy_tag_style jfy_filter_p_4 jfy_cloud\")]"}
Stacktrace:
at FirefoxDriver.prototype.findElementInternal_ (file:///c:/users/j6057~1.kro/appdata/local/temp/tmpdgovsc/extensions/[email protected]/components/driver-component.js:9641:26)
at FirefoxDriver.prototype.findElement (file:///c:/users/j6057~1.kro/appdata/local/temp/tmpdgovsc/extensions/[email protected]/components/driver-component.js:9650:3)
at DelayedCommand.prototype.executeInternal_/h (file:///c:/users/j6057~1.kro/appdata/local/temp/tmpdgovsc/extensions/[email protected]/components/command-processor.js:11635:16)
at DelayedCommand.prototype.executeInternal_ (file:///c:/users/j6057~1.kro/appdata/local/temp/tmpdgovsc/extensions/[email protected]/components/command-processor.js:11640:7)
at DelayedCommand.prototype.execute/< (file:///c:/users/j6057~1.kro/appdata/local/temp/tmpdgovsc/extensions/[email protected]/components/command-processor.js:11582:5)

Answer 1

您需要应用多项更改才能使其正常工作：

• 使用

  Chrome()

  驱动程序以避免点击“搜索”后打开多个窗口
• 不要使用硬编码的

  time.sleep()

  间隔 - 使用 “显式等待”
• 日期选择器元素 id 正在更改，您需要使用

  starts-with()

  来查找它们
• 使用

  ActionChains()

  将价格元素悬停并等待范围变得可见

工作代码（选择“USD 25 - 50”范围）：

from selenium import webdriver
from selenium.webdriver import ActionChains
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC


city = 'nha thrang'

url = 'http://www.tripadvisor.nl/Hotels'
driver = webdriver.Chrome()
driver.get(url)

# insert city & dates
searchbox = WebDriverWait(driver, 10).until(EC.presence_of_element_located((By.ID, 'searchbox')))
searchbox.send_keys(city)

driver.find_element_by_xpath('//span[starts-with(@id, "date_picker_in_")]').click()
driver.find_elements_by_class_name('day')[15].click()

driver.find_element_by_xpath('//span[starts-with(@id, "date_picker_out_")]').click()
driver.find_elements_by_class_name('day')[16].click()

# click search
driver.find_element_by_id('SUBMIT_HOTELS').click()

# select price range
price = WebDriverWait(driver, 10).until(EC.presence_of_element_located((By.XPATH, '//div[starts-with(@class, "JFY_hotel_filter_icon enabled price sprite-price")]')))

ActionChains(driver).move_to_element(price).perform()

price_range = WebDriverWait(driver, 10).until(EC.visibility_of_element_located((By.XPATH, '(//div[contains(@class, "jfy_filter_bar_price")]//div[@value="p 8"])[last()]')))
price_range.click()

结果为：

Answer 2

我得到了相同的 Traceback ，尝试在找到你的元素之前添加它：

driver.switch_to_window(driver.window_handles[1])#locate the first new page (handles)

无论如何它对我有用