I'm using odoo 12
I'm at /web#id=13&model=res.partner&view_type=form&menu_id=111 and I want to add a new field partnerNbr to that view

I don't know what module that is but I'm guessing /addons/base/ so I've gone into addons/base/models/res_partner.py and added it there and to addons/base/views/res_partners_views.xml and added it there. Then I restarted odoo but I can't see my added partnerNbr field