code: def test_invalid_shape(self):
      x = chainer.Variable(numpy.zeros((1, 2), dtype=numpy.float32))
      with self.assertRaises(type_check.InvalidType):
          functions.inv(x)
  
imports: import unittest
  import numpy
  import chainer
  from chainer.backends import cuda
  from chainer import functions
  from chainer import testing
  from chainer.testing import attr
  from chainer.utils import type_check
label_desc: Use image node_id 2 for calling the InvFunctionRaiseTest obj's underlying member method code with example usage: obj.test_invalid_shape() without return types