在遍历URL时如何解决动态DOM问题

Question

我想做以下事情：

1. 打开URL
2. 点击下载
3. 打开具有新URL的新选项卡
4. 关闭上一个选项卡
5. 单击新URL上的下载(新选项卡(
6. 重复

这是我的代码(底部错误(：

from selenium import webdriver
from selenium.webdriver.common.keys import Keys
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
import time
from datetime import datetime, timedelta

# Load Chrome driver and movement.uber.com/cities website
PATH = 'C:Program Files (x86)chromedriver.exe'
driver = webdriver.Chrome(PATH)
driver.get('https://movement.uber.com/explore/atlanta/travel-times/query?si1074&ti=&ag=taz&dt[tpb]=ALL_DAY&dt[wd;]=1,2,3,4,5,6,7&dt[dr][sd]=2016-01-02&dt[dr][ed]=2016-01-02&cd=&sa;=&sdn=&lat.=33.7489&lng.=-84.4234622&z.=12&lang=en-US')

# Clicking on download (note that this download the dataset I need, but it shows the point I want to make)
download_button = driver.find_element_by_xpath('/html/body/div[1]/div[1]/div[1]/div[3]/div/div[3]/button')
download_button.click()

# Open new tab
driver.execute_script("window.open('https://movement.uber.com/explore/atlanta/travel-times/query?si1074&ti=&ag=taz&dt[tpb]=ALL_DAY&dt[wd;]=1,2,3,4,5,6,7&dt[dr][sd]=2016-01-02&dt[dr][ed]=2016-01-02&cd=&sa;=&sdn=&lat.=33.7489&lng.=-84.4234622&z.=12&lang=en-US')")

# Switch to the previous tab and close it (leaving us with the new above-opened tab)
tabs = driver.window_handles
if len(tabs) > 1:
driver.switch_to.window(tabs[0])
driver.close()
driver.switch_to.window(tabs[1])

# Click on download AGAIN, but in the newest window (this is where I have the problem)
download_button.click()

我得到的错误是：

StaleElementReferenceException            Traceback (most recent call last)
<ipython-input-88-1b0df7cfcd96> in <module>
----> 1 download_button.click()
c:usersi539797appdatalocalprogramspythonpython38-32libsite-packagesseleniumwebdriverremotewebelement.py in click(self)
78     def click(self):
79         """Clicks the element."""
---> 80         self._execute(Command.CLICK_ELEMENT)
81 
82     def submit(self):
c:usersi539797appdatalocalprogramspythonpython38-32libsite-packagesseleniumwebdriverremotewebelement.py in _execute(self, command, params)
631             params = {}
632         params['id'] = self._id
--> 633         return self._parent.execute(command, params)
634 
635     def find_element(self, by=By.ID, value=None):
c:usersi539797appdatalocalprogramspythonpython38-32libsite-packagesseleniumwebdriverremotewebdriver.py in execute(self, driver_command, params)
319         response = self.command_executor.execute(driver_command, params)
320         if response:
--> 321             self.error_handler.check_response(response)
322             response['value'] = self._unwrap_value(
323                 response.get('value', None))
c:usersi539797appdatalocalprogramspythonpython38-32libsite-packagesseleniumwebdriverremoteerrorhandler.py in check_response(self, response)
240                 alert_text = value['alert'].get('text')
241             raise exception_class(message, screen, stacktrace, alert_text)
--> 242         raise exception_class(message, screen, stacktrace)
243 
244     def _value_or_default(self, obj, key, default):
StaleElementReferenceException: Message: stale element reference: element is not attached to the page document
(Session info: chrome=84.0.4147.105)

当我在新选项卡上时，如何绕过这个动态DOM问题并能够毫无问题地点击下载按钮？

我的最终目标是迭代不同日期的URL，并点击每个URL上的下载，这样我就可以分别下载每天的数据集。这就是为什么我需要访问不同的URL。

Answer 1

总是在调用.click之前再次初始化download_button

# Click on download AGAIN, but in the newest window (this is where I have the problem)
download_button = driver.find_element_by_xpath('/html/body/div[1]/div[1]/div[1]/div[3]/div/div[3]/button')
download_button.click()

尽管您的定位器可以工作，但请尝试将此定位器用于download_button:

download_button = driver.find_element_by_css_selector('div.f5 button')