How to get a model's module

Question

I need to get the module name where a model is defined

When I ran env['res.partner']._module inside an odoo shell, the output is snailmail_account_followup, but I expected it to report base

In odoo.models.BaseModel it says this about the _module attribute:

_module = None              #: the model's module (in the Odoo sense)

Is this the expected behaviour? What's the correct way to get the module where a model is originally defined (not inherited)?

Answer 1

I did a bit more digging and I found the solution, so I'll document it here for future reference

Apparently,Model._module is the last module that inherited the model. To get the original module use Model._original_module instead