code: def _mac_arch(arch, is_32bit=_32_BIT_INTERPRETER):
      # type: (str, bool) -> str
      if not is_32bit:
          return arch
  
      if arch.startswith("ppc"):
          return "ppc"
  
      return "i386"
  
imports: from __future__ import absolute_import
  import distutils.util
  import collections
  import logging
  import os
  import platform
  import re
  import struct
  import sys
  import sysconfig
  import warnings
  from ._typing import TYPE_CHECKING, cast
label_desc: Use image node_id 12 for calling a global function with example usage: _mac_arch(arch, is_32bit) and returns: str, arch, str