voucher_print_ticket/ticket_venta_crifin.py

from openerp import api, models
import datetime
from num2words import num2words

class report_ticket_crifin(models.AbstractModel):
    _name = 'report.voucher_print_ticket.report_ticket_crifin'

    @api.multi
    def render_html(self, data=None):
        report_obj = self.env['report']
        report = report_obj._get_report_from_name('voucher_print_ticket.report_ticket_crifin')
        docargs = {
            'doc_ids': self._ids,
            'doc_model': report.model,
            'docs': self.env[report.model].browse(self._ids),
        }
        return report_obj.render('voucher_print_ticket.report_ticket_crifin', docargs)