硒不打印文本

谷仓猫头鹰

我正在尝试打印出标题，以获取编程要单击的链接。我有些麻烦。但是我得到的不是错误，而是其他。是的，我尝试过“文本”，但实际上给了我一个错误

主程序

from selenium import webdriver
from selenium.webdriver.common.keys import Keys
from selenium.webdriver.support.ui import WebDriverWait
import unittest

class Test():
    def setUp(self):
        self.driver = webdriver.Chrome()
        self.driver.get("https://orlando.craigslist.org/search/apa?s=100")

    def task(self):
        driver = self.driver
        ln = driver.find_elements_by_xpath('//*[@id="sortable-results"]/ul/li/p/a')
        size = len(driver.find_elements_by_xpath('//*[@id="sortable-results"]/ul/li/p/a'))

        for i in range(0, size):
            ln = driver.find_elements_by_xpath('//*[@id="sortable-results"]/ul/li/p/a')
            ln = ln[i]
            ln.click()
            print (ln)

            back = driver.find_element_by_xpath('/html/body/section/header/nav/ul/li[3]/p/a').click()
            WebDriverWait(driver,3)
            if i == 5:
                break

    def getInfo(self,ln):
        driver = self.driver
        if ln:
            print (ln)
        else:
            print ("No listing name")


    def initialize():
        return Test

    def teardown(self):
        self.driver.quit()



run = Test()
run.setUp()
tas = run.task()
run.teardown()
WebDriverWait(tas,3)





if __name__ == '__main__':
    unittest.main()

这就是我得到的

<selenium.webdriver.remote.webelement.WebElement (session="214c8aa4e4a919e11149b48fc1971ebf", element="0.47651721823993864-1")>
<selenium.webdriver.remote.webelement.WebElement (session="214c8aa4e4a919e11149b48fc1971ebf", element="0.8722193647053464-2")>
<selenium.webdriver.remote.webelement.WebElement (session="214c8aa4e4a919e11149b48fc1971ebf", element="0.7501031429429339-3")>
<selenium.webdriver.remote.webelement.WebElement (session="214c8aa4e4a919e11149b48fc1971ebf", element="0.1697348713718274-4")>
<selenium.webdriver.remote.webelement.WebElement (session="214c8aa4e4a919e11149b48fc1971ebf", element="0.8560861666106063-5")>
<selenium.webdriver.remote.webelement.WebElement (session="214c8aa4e4a919e11149b48fc1971ebf", element="0.8604981647081367-6")>

这是print（ln.text）给我的东西

Traceback (most recent call last):
  File "main.py", line 45, in <module>
    tas = run.task()
  File "main.py", line 20, in task
    print (ln.text)
  File "/Library/Python/2.7/site-packages/selenium/webdriver/remote/webelement.py", line 73, in text
    return self._execute(Command.GET_ELEMENT_TEXT)['value']
  File "/Library/Python/2.7/site-packages/selenium/webdriver/remote/webelement.py", line 491, in _execute
    return self._parent.execute(command, params)
  File "/Library/Python/2.7/site-packages/selenium/webdriver/remote/webdriver.py", line 238, in execute
    self.error_handler.check_response(response)
  File "/Library/Python/2.7/site-packages/selenium/webdriver/remote/errorhandler.py", line 193, in check_response
    raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.StaleElementReferenceException: Message: stale element reference: element is not attached to the page document
  (Session info: chrome=56.0.2924.87)
  (Driver info: chromedriver=2.27.440174 (e97a722caafc2d3a8b807ee115bfb307f7d2cfd9),platform=Mac OS X 10.11.2 x86_64)

您将看到WebElement实例表示形式字符串。相反，您需要通过获取.text属性的值来获取元素的文本：

print(ln.text)

还要注意，如果您想要硬编码的时间延迟，请使用WebDriverWait(driver, 3)line，它实际上不会做任何事情（好吧，除非WebDriverWait很快将其实例进行垃圾回收），请使用time.sleep(3)，尽管更好的主意是显式等待特定条件通过WebDriverWait和.until()相遇。