模块封装
示例代码：
baidu.py
from time import sleep
from selenium import webdriver
driver = webdriver.Chrome()
driver.get("https://www.baidu.com/")
driver.find_element_by_xpath("//*[@id='kw']").send_keys("selenium")
driver.find_element_by_xpath("//*[@id='su']").click()
from time import
