code: def __init__(self):
      cuda.check_cuda_available()
      if not cuda.cupy.cuda.nvtx_enabled:
          raise RuntimeError("nvtx is required for CUDAProfileHook")
  
file_path: chainer/chainer/function_hooks/cuda_profile.py
imports: from chainer.backends import cuda
  from chainer import function_hook
label_desc: Use image node_id 1 to create a new CUDAProfileHook object from inherited base classes: function_hook with example: obj = CUDAProfileHook()