code: def test_invalid_axis_type_in_tuple(self):
      with self.assertRaises(TypeError):
          functions.sum(self.x, axis=(1, "x"))
  
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 3 for calling the TestSumError obj's underlying member method code with example usage: obj.test_invalid_axis_type_in_tuple() without return types