code: def test_invlaid_axis_type(self):
      inputs = [numpy.random.rand(3, 4), numpy.random.rand(3, 1)]
  
      with self.assertRaises(TypeError):
          functions.concat(inputs, "a")
  
file_path: chainer/tests/chainer_tests/functions_tests/array_tests/test_concat.py
imports: import unittest
  import numpy
  from chainer import functions
  from chainer import testing
  from chainer.testing import backend
label_desc: Use image node_id 1 for calling the TestConcatInvalidAxisType obj's underlying member method code with example usage: obj.test_invlaid_axis_type() without return types