partner.py

from odoo import fields, models, api


class ResPartner(models.Model):
    _inherit = 'res.partner'
    supplier_rank = fields.Integer(default=0)
    customer_rank = fields.Integer(default=0)
    company_id = fields.Many2one(
        'res.company', string="Company",
        default=lambda self: self.env.company.id
        if not self.company_id else False)
    type = fields.Selection(
        selection_add=[('ppat', 'PPAT'),
                       ('wp', 'Wajib Pajak')],
        ondelete={
            'ppat': 'cascade',
            'wp': 'cascade',
        })