import json
import requests
from urllib.parse import quote
import base64
from bs4 import BeautifulSoup
import random
import sys

# JSON转base64
def btoa(content):
    return base64.b64encode(quote(content).encode())

s = requests.Session()

params = {
  'Dto': {
    'Code': "",
    'LoginName': "2017002372",
    '​​PassWord': "102710",
  }
}
params = str(btoa(json.dumps(params)))[2:-1]

url = 'https://jwgl.cust.edu.cn/api/LoginApi/LocalLogin'

params = {
  "__log":{"Logtype":1},
  "param": params
}

r = s.post(url=url, data=params)
print(r.text)