code: def testTyping(self):
      import importlib.machinery
  
      if sys.version_info < (3, 8):
          check = self.assertFalse
      else:
          check = self.assertTrue
      py_typed = os.path.join(pkgdir, "py.typed")
      check(os.path.exists(py_typed))
      suffixes = [
          *importlib.machinery.SOURCE_SUFFIXES,
          *importlib.machinery.EXTENSION_SUFFIXES,
      ]
      for root, dirs, files in os.walk(pkgdir):
          for fname in files:
              name, _, extra = fname.partition(".")
              suffix = f".{extra}"
              for entry in suffixes:
                  if suffix.endswith(entry):
                      pyi = os.path.join(root, f"{name}.pyi")
                      check(os.path.exists(pyi))
                      break
  
file_path: mpi4py/test/test_package.py
imports: import mpi4py
  import unittest
  import sys, os
label_desc: Use image node_id 1 for calling the TestDataFiles obj's underlying member method code with example usage: obj.testTyping() without return types