class_docstr: Wrapper around the profilers of Pytorch to provide a uniform
  interface, independent of the chosen implementation
code: def __enter__(self):
      self._enter_actions()
  
imports: import functools
  import logging
  import os
  from contextlib import contextmanager
  from vissl.utils.layer_memory_tracking import null_context
label_desc: Use image node_id 2 for calling the Profiler obj's underlying member method code with example usage: obj.__enter__() without return types