code: def __getitem__(self, base):
      class PythranBuildExt(PythranBuildExtMixIn, base):
          pass
  
      return PythranBuildExt
  
file_path: catboost/contrib/python/pythran/pythran/dist.py
imports: import pythran.config
  from collections import defaultdict
  import os.path
  import os
  import setuptools
  from distutils.command.build_ext import build_ext
label_desc: Use image node_id 1 for calling the PythranBuildExtMeta obj's underlying member method code with example usage: obj.__getitem__(base) and returns: PythranBuildExt