Selenium Webdriver：find_element_by_xpath 未找到完整路径答案

【问题标题】：Selenium Webdriver: find_element_by_xpath not locating full pathSelenium Webdriver：find_element_by_xpath 未找到完整路径
【发布时间】：2017-02-15 18:08:42
【问题描述】：

我正在使用 Selenium 2.53.6 和 Chromedriver 在动态网页上定位 HTML DOM 元素。我正在使用 Webdriver 的 find_element_by_xpath() 命令来定位元素。当它是像下面的示例这样的单个元素时，find_element_by_xpath() 会定位该元素。

city1 = driver.find_element_by_xpath("//div[@class='post-body-meta']")

但是，当我扩展路径以在 DOM 层次结构中包含更多元素时：

city1 = driver.find_element_by_xpath("//div[@class='post-body-meta']/span[0]")

然后我得到以下错误（请记住，我尝试了许多不同的元素，而不仅仅是这个特定的元素）：

Traceback (most recent call last):
  File "selen_decko.py", line 72, in <module>
    city1 = driver.find_element_by_xpath("//div[@class='post-body-meta']/span[0]")
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/selenium/webdriver/remote/webdriver.py", line 293, in find_element_by_xpath
    return self.find_element(by=By.XPATH, value=xpath)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/selenium/webdriver/remote/webdriver.py", line 752, in find_element
    'value': value})['value']
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/selenium/webdriver/remote/webdriver.py", line 236, in execute
    self.error_handler.check_response(response)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/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":"//div[@class='post-body-meta']/span[0]"}
  (Session info: chrome=56.0.2924.87)
  (Driver info: chromedriver=2.27.440174 (e97a722caafc2d3a8b807ee115bfb307f7d2cfd9),platform=Mac OS X 10.11.6 x86_64)

Exception ignored in: <bound method Service.__del__ of <selenium.webdriver.chrome.service.Service object at 0x101468b70>>
Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/selenium/webdriver/common/service.py", line 173, in __del__
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/selenium/webdriver/common/service.py", line 149, in stop
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/selenium/webdriver/common/service.py", line 120, in send_remote_shutdown_command

【问题讨论】：

标签： python-3.x selenium selenium-webdriver selenium-chromedriver

【解决方案1】：

如此接近，却又如此遥远。我需要find_elements_by_xpath。主要区别在于elements 与element。此外，索引似乎从 1 开始，而不是 0：

city = driver.find_elements_by_xpath("//div[@class='post-body-meta']/span[1]/a")

【讨论】：

【解决方案2】：

您是否通过 Chrome 的检查工具或 Firefox 的 Firepath 插件输入验证了 xpath？如果没有看到 HTML 代码，我无法确定路径是否有效。

【讨论】：