code: def test_deployment_target_default(self):
      # Issue 9516: Test that, in the absence of the environment variable,
      # an extension module is compiled with the same deployment target as
      #  the interpreter.
      self._try_compile_deployment_target("==", None)
  
imports: import sys
  import os
  from StringIO import StringIO
  import textwrap
  from distutils.core import Extension, Distribution
  from distutils.command.build_ext import build_ext
  from distutils import sysconfig
  from distutils.tests import support
  from distutils.errors import DistutilsSetupError, CompileError, DistutilsPlatformError
  import unittest
  from test import test_support
label_desc: Use image node_id 16 for calling the BuildExtTestCase obj's underlying member method code with example usage: obj.test_deployment_target_default() without return types