code: def initialize_for_bktree():
      hash_dict = OrderedDict(
          {
              "a": "9",
              "b": "D",
              "c": "A",
              "d": "F",
              "e": "2",
              "f": "6",
              "g": "7",
              "h": "E",
          }
      )
      dist_func = Hashing.hamming_distance
      return hash_dict, dist_func
  
file_path: imagededup/tests/test_bktree.py
imports: from collections import OrderedDict
  from imagededup.methods.hashing import Hashing
  from imagededup.handlers.search.bktree import BKTree, BkTreeNode
label_desc: Use image node_id 1 for calling a global function with example usage: initialize_for_bktree() and returns: hash_dict,  dist_func