How to get Carte de Sejour??

Hi guys, I need information, I would like to stay here in Tunis, but i need to know how to obtain the resident card ( carte de sejour) ??? Is it possible to get it according to my studies or..??? Anybody,if you have any information about the procedure or anything please let me know, either here or on my mail.
[email protected]
thank you in advance
xoxoxo

hi sandra its me again !
for how long u want to stay in tunisia ? and also for what reason ? because sometimes u just dont need visa ;)