class_docstr: manages a set of distance sub-indexes. The sub_indexes search a
  subset of the inverted lists. Searches are merged afterwards
class_docstr_tok: ["manages","a","set","of","distance","sub-indexes",".","The","sub_indexes","search","a","subset","of","the","inverted","lists",".","Searches","are","merged","afterwards"]
code: def set_omp_num_threads(self, nt: int) -> None:
      self.pool.map(
          lambda idx: idx.set_omp_num_threads(nt), self.sub_indexes
      )
  
file_path: faiss/contrib/client_server.py
imports: from multiprocessing.pool import ThreadPool
  import faiss
  from typing import List, Tuple
  from .None import rpc
label_desc: Use image node_id 3 for calling the ClientIndex obj's underlying member method code with example usage: obj.set_omp_num_threads(nt) without return types