code: def test_in_update(self):
      a = theano.tensor.dscalar("a")
      f = theano.function(
          [In(a, value=0.0, update=a + 1)], a, mode="FAST_RUN"
      )
  
      # Ensure that, through the executions of the function, the state of the
      # input is persistent and is updated as it should
      assert f() == 0.0
      assert f() == 1.0
      assert f() == 2.0
  
imports: from __future__ import absolute_import, print_function, division
  import six.moves.cPickle
  import os
  import shutil
  import tempfile
  import unittest
  import numpy
  import theano
  from theano.compile.io import In
label_desc: Use image node_id 5 for calling the TestFunctionIn obj's underlying member method code with example usage: obj.test_in_update() without return types