code: def setUp(self):
      if not test_gdb():
          return
  
      super(GdbDebuggerTestCase, self).setUp()
  
      prefix_code = textwrap.dedent(
          """\
              python
  
              import os
              import sys
              import traceback
  
              def excepthook(type, value, tb):
                  traceback.print_exception(type, value, tb)
                  sys.stderr.flush()
                  sys.stdout.flush()
                  os._exit(1)
  
              sys.excepthook = excepthook
  
              # Have tracebacks end up on sys.stderr (gdb replaces sys.stderr
              # with an object that calls gdb.write())
              sys.stderr = sys.__stderr__
  
              end
              """
      )
  
      code = textwrap.dedent(
          """\
              python
  
              from Cython.Debugger.Tests import test_libcython_in_gdb
              test_libcython_in_gdb.main(version=%r)
  
              end
              """
          % (sys.version_info[:2],)
      )
  
      self.gdb_command_file = cygdb.make_command_file(
          self.tempdir, prefix_code
      )
  
      with open(self.gdb_command_file, "a") as f:
          f.write(code)
  
      args = [
          "gdb",
          "-batch",
          "-x",
          self.gdb_command_file,
          "-n",
          "--args",
          sys.executable,
          "-c",
          "import codefile",
      ]
  
      paths = []
      path = os.environ.get("PYTHONPATH")
      if path:
          paths.append(path)
      paths.append(
          os.path.dirname(
              os.path.dirname(os.path.abspath(Cython.__file__))
          )
      )
      env = dict(os.environ, PYTHONPATH=os.pathsep.join(paths))
  
      self.p = subprocess.Popen(
          args, stdout=subprocess.PIPE, stderr=subprocess.PIPE, env=env
      )
  
imports: import os
  import re
  import sys
  import shutil
  import warnings
  import textwrap
  import unittest
  import tempfile
  import subprocess
  from distutils import ccompiler
  import runtests
  import Cython.Distutils.extension
  import Cython.Distutils.old_build_ext
  from Cython.Debugger import Cygdb
label_desc: Use image node_id 1 for calling the GdbDebuggerTestCase obj's underlying member method code with example usage: obj.setUp() without return types