code: def __init__(self):
      super(DynamicExampleModel, self).__init__()
      with self.init_scope():
          self.a = chainer.links.Linear(2, 3)
          self.b = chainer.links.Linear(3, 4)
  
imports: import chainer
  from chainer.backends.cuda import cupy
  import chainer.testing
  import chainer.testing.attr
  import chainermn
  from chainermn import nccl
  import mock
  import numpy
  import pytest
  import unittest
label_desc: Use image node_id 1 to create a new DynamicExampleModel object from inherited base classes: chainer with example: obj = DynamicExampleModel()