code: def test_matrix_mult():
      W = torch.tensor([[1, 2], [3, 4]])
      b = torch.tensor([[1, 2, 3]])
      check("W@b+torch.abs(b)", "W@b")
  
file_path: tensor-sensor/testing/test_incr_eval.py
imports: from tsensor.ast import IncrEvalTrap
  from tsensor.parsing import PyExprParser
  import sys
  import numpy
  import torch
label_desc: Use image node_id 3 for calling a global function with example usage: test_matrix_mult() without return types