code: def test_raise_invalid_type(self):
      with self.assertRaises(utils.type_check.InvalidType):
          einsum.einsum(self.subscripts, *self.inputs)
  
imports: import unittest
  import numpy
  import chainer
  from chainer.backends import cuda
  from chainer.functions.math import einsum
  from chainer import gradient_check
  from chainer import testing
  from chainer.testing import attr
  from chainer import utils
label_desc: Use image node_id 2 for calling the TestEinSumInvalid obj's underlying member method code with example usage: obj.test_raise_invalid_type() without return types