登录测试：

from selenium import webdriver
import time
driver = webdriver.Firefox()
driver.get("https://www.lagou.com/")
driver.find_element_by_link_text("北京站").click()
driver.find_element_by_link_text("登录").click()
user = "你的用户名"
pwd = "你的密码"
time.sleep(1)
us_ele = driver.find_element_by_partial_link_text("请输入常用手机号/邮箱")
us_ele.send_keys(user)
time.sleep(1)
pwd_ele = driver.find_element_by_partial_link_text("请输入密码")
pwd_ele.send_keys(pwd)
driver.find_elements_by_link_text("登录").click()
#定义捕获异常：
try:
    e_error = driver.find_elements_by_link_text("该账号格式不正确！")
except Exception as e:
    print("登录错误！")