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Return the least busy backend from a list.

Return the least busy available backend for those that have a pending_jobs in their status. Note that local backends may not have this attribute.


backends (List[Backend]) – The backends to choose from.

Return type



The backend with the fewest number of pending jobs.


IBMError – If the backends list is empty, or if none of the backends is available, or if a backend in the list does not have the pending_jobs attribute in its status.

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