def describe()

in torchx/schedulers/docker_scheduler.py [0:0]
47 lines of code
11 McCabe index (conditional complexity)

    def describe(self, app_id: str) -> Optional[DescribeAppResponse]:
        roles = {}
        roles_statuses = {}

        states = []

        containers = self._get_containers(app_id)
        for container in containers:
            role = container.labels[LABEL_ROLE_NAME]
            replica_id = container.labels[LABEL_REPLICA_ID]

            if role not in roles:
                roles[role] = Role(
                    name=role,
                    num_replicas=0,
                    image=container.image,
                )
                roles_statuses[role] = RoleStatus(role, [])
            roles[role].num_replicas += 1

            if container.status == "exited":
                # docker doesn't have success/failed states -- we have to call
                # `wait()` to get the exit code to determine that
                status = container.wait(timeout=10)
                if status["StatusCode"] == 0:
                    state = AppState.SUCCEEDED
                else:
                    state = AppState.FAILED
            else:
                state = CONTAINER_STATE[container.status]

            roles_statuses[role].replicas.append(
                ReplicaStatus(
                    id=int(replica_id),
                    role=role,
                    state=state,
                    hostname=container.name,
                )
            )
            states.append(state)

        state = AppState.UNKNOWN
        if all(is_terminal(state) for state in states):
            if all(state == AppState.SUCCEEDED for state in states):
                state = AppState.SUCCEEDED
            else:
                state = AppState.FAILED
        else:
            state = next(state for state in states if not is_terminal(state))

        return DescribeAppResponse(
            app_id=app_id,
            roles=list(roles.values()),
            roles_statuses=list(roles_statuses.values()),
            state=state,
        )