code: def get_gpu_mem_size(id):
      assert (
          singa.USE_CUDA
      ), "SINGA has not been compiled with CUDA enabled."
      return singa.Platform.GetGPUMemSize(id)
  
file_path: singa/python/singa/device.py
imports: from .None import singa_wrap
label_desc: Use image node_id 3 for calling a global function with example usage: get_gpu_mem_size(id) and returns: singa