from selenium import  webdriver

import  time

driver=webdriver.Chrome()

driver.get("http://music.163.com/#/login")

now_handle =  driver.current_window_handle #得到当前窗口句柄

time.sleep(5)

driver.switch_to.frame( driver.find_element_by_id("g_iframe"))

a= driver.find_elements_by_xpath("//div[@class='u-alt']/ul/li/a")

a[3].click()

time.sleep(5)

#name=driver.find_element_byame("iframe")

#print(driver.page_source)

driver.switch_to.window( driver.current_window_handle)

time.sleep(5)

username= driver.find_element_by_xpath("//div[@class='f-pr']/input[@type='text']")

username.send_keys("用户名")

passwd= driver.find_element_by_xpath("//input[@type='password']")

passwd.send_keys("密码")

sumbit= driver.find_element_by_xpath("//a[@class='js-primary u-btn2 u-btn2-2']").click()