前言：

又到了一学期一度的渣电的退补选，退补选这东西 谁退了谁抢到就是本事，闲着没事，写一个自动化抢课脚本。

使用方法：`

0. 安装selenium
1. username改成自已的学号
   pwd改成自已的密码
2. coursePath修改成自已想要的课的xpath路径,得到xpath的方法为
   使用chrome打开选课页面,找到所选课程,右键"检查",然后再调试界面默认选择的蓝色区域右键copy->copy xpath.即可
   如果xpath中间有"或其它特殊符号，在xpath路径里面的"前加\
3. 刷新不要太频繁

代码：

__author__ = 'jmh081701'#coding:utf8
from selenium import webdriver
from selenium.common.exceptions import NoSuchElementException
from  selenium.webdriver.common.keys import Keys
import time
import sys
import threadingclass CourseSelect:def __int__(self):passdef loginToSelectCource(self,id,pwd):self.url="http://portal.uestc.edu.cn"self.brower =webdriver.Chrome("C:\\chromedriver.exe")brower=self.browerpage =brower.get(self.url)username=brower.find_element_by_id('username')password=brower.find_element_by_id('password')username.send_keys(id)password.send_keys(pwd)loginBtn=brower.find_element_by_xpath("//*[@id=\"casLoginForm\"]/p[4]/button")loginBtn.submit()brower.get("http://eams.uestc.edu.cn/eams/home.action")time.sleep(2)brower.get("http://eams.uestc.edu.cn/eams/home.action")time.sleep(2)kcgl=brower.find_element_by_xpath("//*[@id=\"MLeft\"]/div/ul/li[2]/a/div")kcgl.click()time.sleep(2)xk=brower.find_element_by_xpath("//*[@id=\"MLeft\"]/div/table[2]/tbody/tr[1]/td[7]/div[2]/a")xk.click()def selectA(self,xpath="//*[@id=\"lesson296968\"]/td[11]/a"):#选A类课brower=self.browerurlA="http://eams.uestc.edu.cn/eams/stdElectCourse!defaultPage.action?electionProfile.id=1137"brower.get(urlA)try:brower.switch_to_alert().accept()except:passxk=brower.find_element_by_xpath(xpath)xk.click()brower.switch_to_alert().accept()time.sleep(1)def selectB(self,xpath="//*[@id=\"lesson303459\"]/td[11]/a"):#选B类课brower=self.browerbrower.get("http://eams.uestc.edu.cn/eams/stdElectCourse!defaultPage.action?electionProfile.id=1138")try:brower.switch_to_alert().accept()except:passxk=brower.find_element_by_xpath(xpath)xk.click()brower.switch_to_alert().accept()time.sleep(1)if __name__ == '__main__':username='201466666666'pwd='66666'xk =CourseSelect()xk.loginToSelectCource(username,pwd)coursePath="//*[@id=\"lesson303459\"]/td[11]/a"while True:xk.selectB(coursePath)time.sleep(3)

上面的代码默认选2017年秋季的“素描”课,ok，运行起来，美滋滋！