code: def load_tests(loader, _, pattern):
      suite = unittest.TestSuite()
      for mod in (json, json.encoder, json.decoder):
          suite.addTest(doctest.DocTestSuite(mod))
      suite.addTest(TestPyTest("test_pyjson"))
      suite.addTest(TestCTest("test_cjson"))
  
      pkg_dir = os.path.dirname(__file__)
      return support.load_package_tests(pkg_dir, loader, suite, pattern)
  
file_path: cpython/Lib/test/test_json/__init__.py
imports: import os
  import json
  import doctest
  import unittest
  from test import support
  from test.support import import_helper
label_desc: Use image node_id 1 for calling a global function with example usage: load_tests(loader, _, pattern) and returns: support