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How to use _is_host_invalid method in autotest

Best Python code snippet using autotest_python

host_scheduler.py

Source:host_scheduler.py

...209        return set(host_id for host_id in group_hosts210                   if self.is_host_usable(host_id)211                   and self.is_host_eligible_for_job(host_id, queue_entry))212    def is_host_eligible_for_job(self, host_id, queue_entry):213        if self._is_host_invalid(host_id):214            # if an invalid host is scheduled for a job, it's a one-time host215            # and it therefore bypasses eligibility checks. note this can only216            # happen for non-metahosts, because invalid hosts have their label217            # relationships cleared.218            return True219        job_dependencies = self._job_dependencies.get(queue_entry.job_id, set())220        host_labels = self._host_labels.get(host_id, set())221        return (self._is_acl_accessible(host_id, queue_entry) and222                self._check_job_dependencies(job_dependencies, host_labels) and223                self._check_only_if_needed_labels(224                    job_dependencies, host_labels, queue_entry) and225                self._check_atomic_group_labels(host_labels, queue_entry))226    def _is_host_invalid(self, host_id):227        host_object = self._hosts_available.get(host_id, None)228        return host_object and host_object.invalid229    def _schedule_non_metahost(self, queue_entry):230        if not self.is_host_eligible_for_job(queue_entry.host_id, queue_entry):231            return None232        return self._hosts_available.pop(queue_entry.host_id, None)233    def is_host_usable(self, host_id):234        if host_id not in self._hosts_available:235            # host was already used during this scheduling cycle236            return False237        if self._hosts_available[host_id].invalid:238            # Invalid hosts cannot be used for metahosts.  They're included in239            # the original query because they can be used by non-metahosts.240            return False...

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