code: def setUpModule():
      global libc_name
      if os.name == "nt":
          libc_name = find_library("c")
      elif sys.platform == "cygwin":
          libc_name = "cygwin1.dll"
      else:
          libc_name = find_library("c")
  
      if test.support.verbose:
          print("libc_name is", libc_name)
  
imports: import _ctypes
  import _ctypes_test
  import ctypes
  import os
  import shutil
  import subprocess
  import sys
  import test.support
  import unittest
  from ctypes import CDLL, cdll, addressof, c_void_p, c_char_p
  from ctypes.util import find_library
  from test.support import import_helper, os_helper
label_desc: Use image node_id 1 for calling a global function with example usage: setUpModule() without return types