code: def set_macro(self, macro, path, key):
      self.macros["$(%s)" % macro] = Reg.get_value(path, key)
  
imports: import os
  import subprocess
  import sys
  import re
  import warnings
  from .errors import DistutilsExecError, DistutilsPlatformError, CompileError, LibError, LinkError
  from .ccompiler import CCompiler, gen_lib_options
  from ._log import log
  from .util import get_platform
  import winreg
label_desc: Use image node_id 2 for calling the MacroExpander obj's underlying member method code with example usage: obj.set_macro(macro, path, key) without return types