ActionChains 类提供的鼠标操作的常用方法：
1. context_click() 右击
2. double_click() 双击
3. drag_and_drop() 拖动
4. move_to_element() 鼠标悬停
5. perform() 执行所有 ActionChains 中存储的行为
import time
from selenium import webdriver
from selenium.webdriver.common.action_chains import ActionChains
driver = webdriver.Firefox()
driver.get('http://www.yiuxiu.com')
logEle = driver.find_element_by_class_name('po-r')
ActionChains(driver).move_to_element(logEle).perform()
# ActionChains(driver).context_click(logEle).perform()
logBtn = driver.find_element_by_xpath('/html/body/div[1]/div/ul[2]/li[1]/div/div[2]/a')
logBtn.click()
logEleBtn = driver.find_element_by_xpath('/html/body/div[2]/div/div[2]/div[1]/ul/li[2]')
logEleBtn.click()
from selenium.webdriver.common.keys import Keys
phoneText = driver.find_element_by_class_name('username')
phoneText.send_keys('18658196789')
time.sleep(2)
phoneText.send_keys(Keys.BACK_SPACE)
time.sleep(2)
phoneText.send_keys(Keys.CONTROL,'a')
time.sleep(2)
phoneText.send_keys(Keys.CONTROL,'x')
time.sleep(2)
phoneText.send_keys(Keys.CONTROL,'v')
time.sleep(2)
driver.find_element_by_class_name('password').send_keys('123456')
driver.find_element_by_class_name('password').send_keys(Keys.ENTER)
#也可定位登陆按钮，通过enter（回车）代替click()
# driver.find_element_by_class_name('login-btn').click()
