<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _get_vm(self, instance_id, force_reload=True):
 """ Return details on the VM with the given name. :param str node_name: instance identifier :param bool force_reload: if ``True``, skip searching caches and reload instance from server and immediately reload instance data from cloud provider :return: py:class:`novaclient.v1_1.servers.Server` - instance :raises: `InstanceError` is returned if the instance can't be found in the local cache or in the cloud. """

        self._init_az_api()
        if force_reload:
            # Remove from cache and get from server again
            self._inventory = {}
        cluster_name, node_name = instance_id
        self._init_inventory(cluster_name)

        # if instance is known, return it
        if node_name not in self._vm_details:
            vm_info = self._compute_client.virtual_machines.get(
                cluster_name, node_name, 'instanceView')
            self._vm_details[node_name] = vm_info

        try:
            return self._vm_details[node_name]
        except KeyError:
            raise InstanceNotFoundError(
                "Instance `{instance_id}` not found"
                .format(instance_id=instance_id))