code: def activate(self):
      self.context = self.engine.create_execution_context()
  
imports: from collections import OrderedDict
  from copy import copy
  import numpy
  import tensorrt
  import torch
  from polygraphy import cuda
  from polygraphy.backend.common import bytes_from_path
  from polygraphy.backend.trt import engine_from_bytes
  from polygraphy.backend.trt import util
label_desc: Use image node_id 5 for calling the Engine obj's underlying member method code with example usage: obj.activate() without return types