wdb debugger odoo; debugger url => http://localhost:1984

product.py

# -*- coding: utf-8 -*
from odoo import models, fields, api

class ProductProduct(models.Model):
    _inherit = 'product.product'

    brand = fields.Many2one(
        'product.brand',
        string="Brand"
    )
    color = fields.Char(
        string = "Color"
    )
    model = fields.Char(
        string="Model"
    )
    year = fields.Integer(
        string="Year"
    )
    engine_number = fields.Char(
        string="Engine Number"
    )
    operator_driver = fields.Char(
        string="Operator Driver"
    )

    # filter is_bbm
    @api.model
    def default_get(self, fields):
        isBBM = self._context.get('is_bbm')
        values = super(ProductProduct, self).default_get(fields)
        
        # debug break point;
        # here is debugger
        import wdb;
        wdb.set_trace()
        
        if isBBM === True:
            values['uom_id'] = self.env.ref('product.product_uom_litre').id

        return values