code: def clear(self):
      self.loss = None
  
file_path: chainer/tests/chainer_tests/training_tests/updaters_tests/snippets/child_reporter.py
imports: import sys
  import numpy
  import chainer
  from chainer.training import trainer
  import chainer.training.updaters.multiprocess_parallel_updater
label_desc: Use image node_id 2 for calling the SimpleNetChildReporter obj's underlying member method code with example usage: obj.clear() without return types