code: def k_reciprocal_neigh(initial_rank, i, k1):
      forward_k_neigh_index = initial_rank[i, : k1 + 1]
      backward_k_neigh_index = initial_rank[
          forward_k_neigh_index, : k1 + 1
      ]
      fi = np.where(backward_k_neigh_index == i)[0]
      return forward_k_neigh_index[fi]
  
imports: import os
  import re
  import cv2
  import gc
  import numpy
  import pandas
  from tqdm import tqdm
  import warnings
label_desc: Use image node_id 17 for calling a global function with example usage: k_reciprocal_neigh(initial_rank, i, k1) and returns: forward_k_neigh_index