code: def ensure_module_file(file):
      if isinstance(file, tuple):
          return file
      else:
          return file, []
  
imports: import copy
  from distutils import ccompiler
  from distutils import sysconfig
  import os
  import shutil
  import sys
  import setuptools
  import cupy_builder.install_build
  from cupy_builder._context import Context
  from cupy_builder.install_build import PLATFORM_LINUX
  from cupy_builder.install_build import PLATFORM_WIN32
label_desc: Use image node_id 1 for calling a global function with example usage: ensure_module_file(file) and returns: file, file,  list