code: def reset(self):
      self.value = 0
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import os
  import tempfile
  import tensorflow
  from tf_agents.metrics import py_metric
label_desc: Use image node_id 2 for calling the DummyMetric obj's underlying member method code with example usage: obj.reset() without return types