这是我第一次体验Selenium和HTML。
我尝试使用IDE，然后按照它指示的"方式"。 我的 IDE 录制脚本说
Command | Target
-----------------------------------------------
click | css=#hamburger-btn
click | css=div.menu-item.menu-item-selected > span.menu-item-title
click | css=div.menu-item.menu-item-selected > div.menu-panel-content > div.menu-category-cont > div.menu-category-sub > div.menu-category-sub-item.menu-category-sub-item-selected > span.menu-category-sub-item-title
我试图以这种方式实现它：
browser = webdriver.Chrome()
browser.get(url) #url was defined before
browser.find_element_by_css_selector("#hamburger-btn").click()
browser.find_element_by_css_selector("div.menu-item.menu-item-selected>span.menu-item-title").click()
browser.find_element_by_css_selector('div.menu-item.menu-item-selected>div.menu-panel-content>div.menu-category-cont>div.menu-category-sub>div.menu-category-sub-item.menu-category-sub-item-selected>span.menu-category-sub-item-title').click()
但我收到此"没有此类元素"消息/错误
browser.find_element_by_css_selector('div.menu-item.menu-item-selected>div.menu-panel-content>div.menu-category-cont>div.menu-category-sub>div.menu-category-sub-item.menu-category-sub-item-selected>span.menu-category-sub-item-title').click()
File "C:Python27libsite-packagesseleniumwebdriverremotewebdriver.py", line 597, in find_element_by_css_selector
return self.find_element(by=By.CSS_SELECTOR, value=css_selector)
File "C:Python27libsite-packagesseleniumwebdriverremotewebdriver.py", line 966, in find_element
'value': value})['value']
File "C:Python27libsite-packagesseleniumwebdriverremotewebdriver.py", line 320, in execute
self.error_handler.check_response(response)
File "C:Python27libsite-packagesseleniumwebdriverremoteerrorhandler.py", line 242, in check_response
raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.NoSuchElementException: Message: no such element: Unable to locate element: {"method":"css selector","selector":"div.menu-item.menu-item-selected>div.menu-panel-content>div.menu-category-cont>div.menu-category-sub>div.menu-category-sub-item.menu-category-sub-item-selected>span.menu-category-sub-item-title"}
我做错了什么？
谢谢
国标
也许您尝试访问的元素未正确加载。 尝试添加一个等待语句，
类似于from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.common.by import By
...
browser = webdriver.Chrome()
browser.get(url) #url was defined before
browser.find_element_by_css_selector("#hamburger-btn").click()
browser.find_element_by_css_selector("div.menu-item.menu-item-selected>span.menu-item-title").click()
WebDriverWait(driver, 20).until(
EC.presence_of_element_located((By.CSS_SELECTOR, 'div.menu-item.menu-item-selected>div.menu-panel-content>div.menu-category-cont>div.menu-category-sub>div.menu-category-sub-item.menu-category-sub-item-selected>span.menu-category-sub-item-title')))
browser.find_element_by_css_selector('div.menu-item.menu-item-selected>div.menu-panel-content>div.menu-category-cont>div.menu-category-sub>div.menu-category-sub-item.menu-category-sub-item-selected>span.menu-category-sub-item-title').click()
这是考虑到这个元素实际上存在于你的页面中，并且你用你的css选择器正确地解决了它。