Safe Arrondissements at Night (Paris)

Hi,

I will be in Paris by mid-January as an international student. I am in the midst of looking for a studio so I would like to know which arrondissements are ideal and which to avoid.

I might be having a bar job which would require me to go home late at night. And I am sure that, as a girl, walking alone at night everywhere is not safe so I hope you could help me.

My school is at the 11th and they say it's safe here but I would like to get to know about all the other arrondissements.

Thank you.