code: def test_give_variables_names_small():
      x = theano.tensor.matrix("x")
      y = theano.tensor.dot(x, x)
      fgraph = theano.FunctionGraph((x,), (y,))
      give_variables_names(fgraph.variables)
      assert all(var.name for var in fgraph.variables)
      assert unique([var.name for var in fgraph.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 3 for calling a global function with example usage: test_give_variables_names_small() without return types