我有以下代码：
driver.get(<some url>) for element in driver.find_elements_by_class_name('thumbnail'): element.find_element_by_xpath(".//a").click() #this works and navigates to new page element.find_element_by_link_text('Click here').click() #this doesn't
后者需要通过单击缩略图来导航以下HTML（当然是简化的），该缩略图指向一个新页面，然后需要单击该Click here新页面中的链接：
Click here
<!DOCTYPE html> <html lang="en-US" prefix="og: http://iuytp.me/ns# fb: http://iuytp.me/ns/fb#"> <head> <meta charset="UTF-8" /> <title>Releases</title> </head> <body class="archive category category-releases category-4 custom-background"> <div id="main"> <div id="container" class="one-column"> <div id="content" role="main"> <h1 class="page-title">Releases</h1> <div id="thumbnail-post-display"> <div id="thumbnail-post" class="post-7158 post type-post status-publish format-standard has-post-thumbnail hentry category-blog category-designer category-releases category-uncategorized"> <div class="thumbnail"><a href="http://records.net/uncategorized/designer-7-inch-bufu-records-co-release/" title="Permanent link to Designer – 7 inch" rel="bookmark"><img width="300" height="300" src="http://records.net/dev/wp-content/uploads/2014/05/dboypledge32-300x300.png" class="attachment-thumbnail wp-post-image" alt="dboypledge3" /></a></div> <h2><a href="http://records.net/uncategorized/designer-7-inch-bufu-records-co-release/" title="Permanent link to Designer – 7 inch" rel="bookmark">Designer – 7 inch</a></h2> </div> </div><!--end thumbnail post display--> <div id="thumbnail-post-display"> <div id="thumbnail-post" class="post-7107 post type-post status-publish format-standard has-post-thumbnail hentry category-blog category-releases"> <div class="thumbnail"><a href="http://records.net/releases/people-2014-tour-demos/" title="Permanent link to All My People – 2014 Tour Demos" rel="bookmark"><img width="300" height="300" src="http://records.net/dev/wp-content/uploads/2014/04/01_Doubt-mp3-image-300x300.png" class="attachment-thumbnail wp-post-image" alt="" /></a></div> <h2><a href="http://records.net/releases/people-2014-tour-demos/" title="Permanent link to All My People – 2014 Tour Demos" rel="bookmark">All My People – 2014 Tour Demos</a></h2> </div> </div><!--end thumbnail post display--> <div id="thumbnail-post-display"> <div id="thumbnail-post" class="post-7089 post type-post status-publish format-standard has-post-thumbnail hentry category-blog category-releases"> <div class="thumbnail"><a href="http://records.net/releases/sirens-blossom-talk/" title="Permanent link to Syrins – Boss Talk" rel="bookmark"><img width="300" height="300" src="http://records.net/dev/wp-content/uploads/2014/04/sirens_final_smaller-300x300.jpg" class="attachment-thumbnail wp-post-image" alt="sirens_final_smaller" /></a></div> <h2><a href="http://records.net/releases/sirens-blossom-talk/" title="Permanent link to Syrins – Boss Talk" rel="bookmark">Syrins – Boss Talk</a></h2> </div> </div><!--end thumbnail post display--> <div id="thumbnail-post-display"> <div id="thumbnail-post" class="post-7073 post type-post status-publish format-standard has-post-thumbnail hentry category-blog category-releases"> <div class="thumbnail"><a href="http://records.net/releases/worlds-strongest-man-scares/" title="Permanent link to World’s Tough Man – Sorry Scares You" rel="bookmark"><img width="300" height="300" src="http://records.net/dev/wp-content/uploads/2014/03/a2312749950_10-300x300.jpg" class="attachment-thumbnail wp-post-image" alt="a2312749950_10" /></a></div> <h2><a href="http://records.net/releases/worlds-strongest-man-scares/" title="Permanent link to World’s Tough Man – Sorry Scares You" rel="bookmark">World’s Tough Man – Sorry Scares You</a></h2> </div> </div><!--end thumbnail post display--> <div id="thumbnail-post-display"> <div id="thumbnail-post" class="post-7046 post type-post status-publish format-standard has-post-thumbnail hentry category-blog category-releases"> <div class="thumbnail"><a href="http://records.net/releases/sundog-space-criminal/" title="Permanent link to Dog – Space Criminal" rel="bookmark"><img width="300" height="300" src="http://records.net/dev/wp-content/uploads/2014/03/Sundog_cover_high_res-300x300.jpg" class="attachment-thumbnail wp-post-image" alt="dog_cover_high_res" /></a></div> <h2><a href="http://records.net/releases/sundog-space-criminal/" title="Permanent link to Dog – Space Criminal" rel="bookmark">Dog – Space Criminal</a></h2> </div> </div><!--end thumbnail post display--> <div style="clear:both"></div> </div><!-- #container --> </div><!-- #main --> </div><!-- #wrapper --> </div><!--#bg-wrapper--> </body> </html>
但是我的代码吐出了以下错误：
Traceback (most recent call last): ... File "crawler.py", line 17, in main driver.find_element_by_link_text('Click here').click() File "/Library/Python/2.7/site-packages/selenium/webdriver/remote/webdriver.py", line 254, in find_element_by_link_text return self.find_element(by=By.LINK_TEXT, value=link_text) File "/Library/Python/2.7/site-packages/selenium/webdriver/remote/webdriver.py", line 662, in find_element {'using': by, 'value': value})['value'] File "/Library/Python/2.7/site-packages/selenium/webdriver/remote/webdriver.py", line 173, in execute self.error_handler.check_response(response) File "/Library/Python/2.7/site-packages/selenium/webdriver/remote/errorhandler.py", line 164, in check_response raise exception_class(message, screen, stacktrace) selenium.common.exceptions.NoSuchElementException: Message: u'no such element\n (Session info: chrome=35.0.1916.153)\n (Driver info: chromedriver=2.10.267517,platform=Mac OS X 10.9.3 x86_64)'
问题似乎是该元素未使用新页面的内容进行更新。更换有问题的生产线的element使用driver也不起作用。我究竟做错了什么？
element
driver
请注意，我必须能够对所有缩略图执行此操作（因此需要for循环）。
for
原来，您需要预先存储要导航的链接。这就是最终对我有用的东西（发现此线程很有帮助）：
driver.get(<some url>) elements = driver.find_elements_by_xpath("//h2/a") links = [] for i in range(len(elements)): links.append(elements[i].get_attribute('href')) for link in links: print 'navigating to: ' + link driver.get(link) # do stuff within that page here... driver.back()
