code: def add_ext_suffix_39(vars):
      """
      Ensure vars contains 'EXT_SUFFIX'. pypa/distutils#130
      """
      import _imp
  
      ext_suffix = _imp.extension_suffixes()[0]
      vars.update(
          EXT_SUFFIX=ext_suffix,
          # sysconfig sets SO to match EXT_SUFFIX, so maintain
          # that expectation.
          # https://github.com/python/cpython/blob/785cc6770588de087d09e89a69110af2542be208/Lib/sysconfig.py#L671-L673
          SO=ext_suffix,
      )
  
file_path: catboost/contrib/python/setuptools/py3/setuptools/_distutils/py39compat.py
imports: import functools
  import itertools
  import platform
  import sys
label_desc: Use image node_id 1 for calling a global function with example usage: add_ext_suffix_39(vars) without return types