code: def get_config_h_filename():
      """Return full pathname of installed pyconfig.h file."""
      if python_build:
          if os.name == "nt":
              inc_dir = os.path.join(_sys_home or project_base, "PC")
          else:
              inc_dir = _sys_home or project_base
          return os.path.join(inc_dir, "pyconfig.h")
      else:
          return sysconfig.get_config_h_filename()
  
imports: import os
  import re
  import sys
  import sysconfig
  import pathlib
  from .errors import DistutilsPlatformError
  from .None import py39compat
  from ._functools import pass_none
label_desc: Use image node_id 15 for calling a global function with example usage: get_config_h_filename() and returns: os, sysconfig