code: def get_rocm_path():
      global _rocm_path
  
      # Use a magic word to represent the cache not filled because None is a
      # valid return value.
      if _rocm_path != "NOT_INITIALIZED":
          return _rocm_path
  
      _rocm_path = os.environ.get("ROCM_HOME", "")
      return _rocm_path
  
imports: import contextlib
  import os
  import re
  import shlex
  import shutil
  import subprocess
  import sys
  import tempfile
  from typing import List, Set
  import cupy_builder
  import cupy_builder.install_utils
  from cupy_builder import _environment
  from cupy_builder._context import Context
label_desc: Use image node_id 2 for calling a global function with example usage: get_rocm_path() and returns: _rocm_path, _rocm_path