

def __verify_template(self, hackathon, template_name):
    template = self.template_library.get_template_info_by_name(template_name)
    if (not template):
        raise NotFound(("template cannot be found by name '%s'" % template_name))
    if (not hackathon):
        return template
    hackathon_templates = hackathon.templates
    template_ids = [t.id for t in hackathon_templates]
    if (template.id not in template_ids):
        raise PreconditionFailed(("template '%s' not allowed for hackathon '%s'" % (template_name, hackathon.name)))
    return template

dataset/ETHPy150Open msopentechcn/open-hackathon/open-hackathon-server/src/hackathon/expr/expr_mgr.py ExprManager.__verify_template/original