I have no idea about Python. I just played a bit and have been successful by changing the link of the login page:
old:
Code:
https://id.sueddeutsche.de/service/ticket?redirect_uri=http://epaper.sueddeutsche.de/app/service/epaper-mobil/landing.php?
new:
Code:
https://id.sueddeutsche.de/login/ticket?redirect_uri=http://epaper.sueddeutsche.de/app/service/epaper-mobil/landing.php?
Would be nice, if one of the experts could check it and bring to notice the change to calibre.