code: def mul(a, b):
      return a * b
  
file_path: Theano/theano/compile/tests/test_ops.py
imports: from __future__ import absolute_import, print_function, division
  import numpy
  from theano.tests import unittest_tools
  from theano import function
  import theano
  from theano.tensor import dmatrix, dvector
  from theano.compile import as_op
  import pickle
label_desc: Use image node_id 1 for calling a global function with example usage: mul(a, b) and returns: unknown