python selenium登陆网易云音乐

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()