Using Python Requests: Sessions, Cookies, and POST
I don't know how stubhub's api works, but generally it should look like this:
s = requests.Session()data = {"login":"my_login", "password":"my_password"}url = "http://example.net/login"r = s.post(url, data=data)
Now your session contains cookies provided by login form. To access cookies of this session simply use
s.cookies
Any further actions like another requests will have this cookie