The underlying environment object can now be used more like a standard lookup list for models. This makes development work simpler and more consistent, with low direct impact on day-to-day business users.

Add methods `__contains__`, `__iter__` and `__len__` on environments.

Demo records for partners and products were updated and expanded to use American English examples. This makes sample data feel more familiar and realistic for US-oriented users evaluating or demonstrating Odoo.

Hello,

Improve and Add partner/product demo data in American English.

Thanks,
Somesh Khare