from selenium import webdriver
from selenium.webdriver.support.wait import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.common.by import By
import time
driver = webdriver.Chrome()
driver.get("https://ke.qq.com/")
driver.maximize_window()
driver.find_element_by_xpath('//a[text()="登录"]').click()
# 选择账号类型
name = (By.XPATH,'//a[text()="QQ登录"]')
WebDriverWait(driver,20).until(EC.presence_of_element_located(name))
driver.find_element_by_xpath('//a[text()="QQ登录"]').click()
# 切换iframe需要传的参数，元祖类型，也可以是一个webelement 对象，也可以是iframe的name 或者di属性
ment = (By.XPATH,'//iframe[@name="login_frame_qq"]')
# 等待iframe出现，并切入进去
WebDriverWait(driver,20).until(EC.frame_to_be_available_and_switch_to_it(ment))
time.sleep(2)
# 定位元素
driver.find_element_by_xpath('//span[@class="img_out_focus"]').click()
# 退出iframe
driver.switch_to_default_content()
