code: def assert_count(self, actual, expect):
      self.assertTrue(expect * 0.8 < actual < expect * 1.2)
  
imports: import unittest
  import numpy
  import chainer
  from chainer.backends import cuda
  import chainer.functions
  from chainer import testing
  from chainer.testing import attr
  from chainer.testing import backend
  from chainer.testing import condition
label_desc: Use image node_id 2 for calling the TestNStepLSTMDropout obj's underlying member method code with example usage: obj.assert_count(actual, expect) without return types