from selenium import webdriver
driver = webdriver.Chrome()
url = 'https://mail.qq.com/'
driver.get(url)
driver_frame = driver.find_element_by_css_selector('#login_frame')
driver.switch_to.frame(driver_frame)
driver.find_element_by_id('switcher_plogin').click()
driver.find_element_by_id('u').send_keys('账号')
driver.find_element_by_id('p').send_keys('密码')
driver.find_element_by_id('login_button').click()
driver.quit()



