Hi,
This is my code its not working ...how to chnage
from openerp import models, api

class SaleOrder(models.Model):
    _inherit = 'sale.order'
    @api.multi
   def action_confirm(self):
       res = super(SaleOrder, self).action_confirm()
inv_id = sale.create_invoices()
print 'inv_issssssssssssss',inv_id
if inv_id:
    inv = self.env['account.invoice'].browse(inv_id)
    inv.action_invoice_open()
for picking in sale.picking_ids:
    picking.force_assign()
    picking.action_done()