code: def test_not_is_affine(expr):
      x = eval(expr)
      assert not is_affine(x)
  
file_path: funsor/test/test_affine.py
imports: from collections import OrderedDict
  import pytest
  from funsor.affine import extract_affine, is_affine
  from funsor.cnf import Contraction
  from funsor.domains import Bint, Real, Reals
  from funsor.tensor import Einsum, Tensor
  from funsor.terms import Finitary, Number, Unary, Variable
  from funsor.testing import assert_close, check_funsor, ones, randn, random_gaussian, random_tensor
label_desc: Use image node_id 4 for calling a global function with example usage: test_not_is_affine(expr) without return types