code: def test_invalid_axis_type(self):
      with self.assertRaises(TypeError):
          functions.sum(self.x, axis=[0])
  
file_path: chainer/tests/chainer_tests/functions_tests/math_tests/test_sum.py
imports: import unittest
  import numpy
  from chainer import functions
  from chainer import testing
label_desc: Use image node_id 2 for calling the TestSumError obj's underlying member method code with example usage: obj.test_invalid_axis_type() without return types