code: def test_give_variables_names():
      x = theano.tensor.matrix("x")
      y = x + 1
      z = theano.tensor.dot(x, y)
      variables = (x, y, z)
      give_variables_names(variables)
      assert all(var.name for var in variables)
      assert unique([var.name for var in variables])
  
imports: from __future__ import absolute_import, print_function, division
  import theano
  from theano.gof.utils import give_variables_names, remove, unique
label_desc: Use image node_id 1 for calling a global function with example usage: test_give_variables_names() without return types