# coding:utf-8
from selenium import webdriver
from selenium.webdriver.common.action_chains import ActionChains

driver = webdriver.Firefox()
driver.get("http://www.baidu.com")
# 定位百度页面上鼠标悬停设置按钮
mouse = driver.find_element_by_link_text("设置")
ActionChains(driver).move_to_element(mouse).perform()
driver.find_element_by_link_text("高级搜索").click()

#鼠标悬停
chain = ActionChains(driver)
implement = driver.find_element_by_link_text()
chain.move_to_element(implement).perform()