I have the list_price of the product.template model and the amount field of the account.tax.template model.

I want to use those two fields in one view: product.template.product.form

How could I do it?

Thats my code:

from odoo import fields, models, api, tools


class ProductTemplate(models.Model):
    _name = 'product.template'
    _inherit = 'product.template'

    pventa_iva = fields.Float('PVP (IVA)')
    pcompra_iva = fields.Float('COSTE (IVA)')
    ratio = fields.Float('Ratio')
    iva = fields.Integer('datos iva', compute='_venta_iva')
    total = fields.Float(compute='_compute_total')
    impuestos = fields.Float(compute='_compute_impuestos')


    @api.depends('taxes_id')
    def _venta_iva(self):
        for record in self:
            record.iva = record.taxes_id

    @api.depends('list_price', 'iva')
    def _compute_total(self):
        for record in self:
            record.total = record.list_price * record.iva\

    @api.multi
    def _compute_impuestos(self):
        res = self.env['account.tax'].browse('amount') 
        return res