code: def test_invalid_full_partial_ambiguous(self):
      with self.assertRaises(ValueError):
          functions.bilinear(self.e1, self.e2, self.W, self.V1)
  
imports: import unittest
  import numpy
  import chainer
  from chainer import backend
  from chainer.backends import cuda
  from chainer import functions
  from chainer import testing
  from chainer.testing import attr
label_desc: Use image node_id 2 for calling the TestBilinearFunctionInvalidArgument obj's underlying member method code with example usage: obj.test_invalid_full_partial_ambiguous() without return types