坐在图书馆摸鱼学习的时候，想下载老师的整个PPT，不过点击好麻烦啊...

话不多说直接上代码

import requests
import time
from bs4 import BeautifulSoup
import os
import json
from urllib import parse

# 注意是Python3的代码
#获取验证码
print("正在获取验证码......")
session = requests.session()
session.get("http://jwc.swjtu.edu.cn/service/login.html")
r = session.get("http://jwc.swjtu.edu.cn/vatuu/GetRandomNumberToJPEG?test="+str(int(time.time())))
with open("code.jpg", "wb") as f:
    f.write(r.content)
os.startfile("code.jpg")

#获取用户信息
yzm = input("请输入验证码：")
username = input("请输入用户名：")
password = input("请输入密码：")

#模拟登陆
#第一步，POST发送
sendmsg = {
    'username': username,
    'password': password,
    'url': 'http://jwc.swjtu.edu.cn/vatuu/UserExitAction&returnUrl',
    'area': '',
    'ranstring': yzm,
    }
login_header = {
    'Referer': 'http://jwc.swjtu.edu.cn/service/login.html',
    'Origin': 'http://jwc.swjtu.edu.cn',
    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.131 Safari/537.36',
    'DNT': '1',
    'Accept': 'application/json, text/javascript, */*; q=0.01',
    'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8',
    'X-Requested-With': 'XMLHttpRequest',
}
r = session.post("http://jwc.swjtu.edu.cn/vatuu/UserLoginAction", data=sendmsg, headers=login_header)
json = json.loads(r.text)
print(json['loginMsg'])

#第二步，确认登陆
sendmsg = {
    'url': 'http://jwc.swjtu.edu.cn/vatuu/UserExitAction&returnUrl',
    'returnUrl': '',
    'loginMsg': json['loginMsg']
}
login_header = {
    'Referer': 'http://jwc.swjtu.edu.cn/vatuu/StudentScoreInfoAction?setAction=studentMarkUseProgram',
    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.131 Safari/537.36',
    'DNT': '1',
    'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3',
    'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8',
    'Upgrade-Insecure-Requests': '1',
    'Accept-Encoding': 'deflate',
    'Accept-Language': 'zh-CN,zh;q=0.9'
}
r = session.post("http://jwc.swjtu.edu.cn/vatuu/UserLoadingAction", data=sendmsg, headers=login_header)
if '系统正在准备中，请稍候' in r.text:
    print('成功登陆！')
#已经成功登陆
r = session.get('http://jwc.swjtu.edu.cn/vatuu/StudentTeachResourceAction?setAction=teachCourse')

soup = BeautifulSoup(r.text, "lxml")
for i in soup.find_all('a', "btn btn-mini btn-blue"):
    # 获取课程访问的URL
    url = str(i.get('href'))
    url = url.replace('..', 'http://jwc.swjtu.edu.cn')
    # 从URL中解析出课程名称
    result = parse.urlparse(url)
    query_dict = parse.parse_qs(result.query)
    courseName = query_dict['courseName'][0]
    # 建立课程文件夹
    try:
        os.makedirs(courseName)
    except:
        print('%s 课程文件夹已存在，跳过该课程...'%courseName)
        continue
    r = session.get(url)
    text = r.text.replace('\n', '')
    text = text.replace('\r', '')
    tmp = BeautifulSoup(text, "lxml")
    for k in tmp.find_all('a', string="查看"):
        # 依次取出
        # 取出教师名称
        c_time = k.parent.previous_sibling.previous_sibling.string
        teacher = k.parent.previous_sibling.previous_sibling.previous_sibling.previous_sibling.string
        url = str(k.get('href'))
        url = url.replace('..', 'http://jwc.swjtu.edu.cn')
        # 访问下载界面
        r = session.get(url)
        temp = BeautifulSoup(r.text, "lxml")
        tag = temp.find('a', string="点击下载")
        url = str(tag.get('href'))
        url = url.replace('..', 'http://jwc.swjtu.edu.cn')
        # 获取文件名称
        name_tag = temp.find('td', style="color: #0EA33F")
        name = name_tag.string
        # 开始下载
        print('开始下载：%s-%s-%s'%(courseName, teacher, name))
        wj = session.get(url)
        name = str(name).replace('\\', '-')
        name = str(name).replace('..', '-')
        with open("%s\\%s-%s-%s"%(courseName, teacher, c_time, name), "wb") as f:
            print('下载完成：%s-%s-%s' % (courseName, teacher, name))
            f.write(wj.content)

代码写的很简单 但用起来没什么问题
单线程爬取和下载，有蛋疼热心的同学可改成异步或多线程的
顺便吐槽一下
所有科目合起来1.9G
马原+毛概+形政=1.6G