currency_utility/model/res_currency.py

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

class ResCurrency(models.Model):
    _inherit = 'res.currency'
    _name = 'res.currency'

    decimal_separator = fields.Selection([('.', '.'),(',', ',')],'Decimal Separator', default=",", required=True)
    decimal_places = fields.Integer(string='Decimal Places', default=0, required=True)
    thousands_separator = fields.Selection([('.', '.'),(',', ',')],'thousands Separator', default=".", required=True)
    symbol_position = fields.Selection([('before', 'Antes del importe'),('after', 'Después del importe')],'Symbol Position', default="before", required=True)

    @api.model
    def currency_utility(self):
        # Actualizar Moneda Guarani
        currency_pyg = self.env['res.currency'].search([('name', '=', 'PYG')])
        currency_pyg.write({
            'decimal_separator': ',',
            'decimal_places': 0,
            'thousands_separator' : '.',
            'symbol_position' : 'before'
        } )

        # Actualizar Moneda Rela - Peso
        currency_brl_ars = self.env['res.currency'].search([('name', 'in', ['BRL','ARS'])])
        currency_brl_ars.write({
            'decimal_separator': ',',
            'decimal_places': 2,
            'thousands_separator': '.',
            'symbol_position': 'before'
        })

        # Actualizar Moneda Dolar
        currency_usd = self.env['res.currency'].search([('name', '=', 'USD')])
        currency_usd.write({
            'decimal_separator': '.',
            'decimal_places': 2,
            'thousands_separator': ',',
            'symbol_position': 'before'
        })