code: def test_hash_file(self):
      assert (
          functions.hash_file(filepath)
          == "1c67f8f573b69a9da2f986e1006ff63a"
          "10fbb70298af45d0293e490b65b34edc"
      )
  
      assert functions.hash_file(filepath) == functions.hash_file(
          filepath, 2
      )
  
imports: from __future__ import absolute_import, print_function, division, unicode_literals
  import unittest
  import os
  import numpy
  from xcessiv import functions, exceptions
  from sklearn.datasets import load_digits
  from sklearn.ensemble import RandomForestClassifier
  from sklearn.decomposition import PCA
  from sklearn.pipeline import Pipeline
  import pickle
label_desc: Use image node_id 1 for calling the TestHashFile obj's underlying member method code with example usage: obj.test_hash_file() without return types