class_docstr: Scope object for bulk execution.
code: def __enter__(self):
      self._old_size = set_bulk_size(self._size)
      return self
  
file_path: mxnet/python/mxnet/engine.py
imports: import ctypes
  from .base import _LIB, check_call
label_desc: Use image node_id 2 for calling the _BulkScope obj's underlying member method code with example usage: obj.__enter__() and returns: self