code: def test_remove():
      def even(x):
          return x % 2 == 0
  
      def odd(x):
          return x % 2 == 1
  
      # The list are needed as with python 3, remove and filter return generators
      # and we can't compare generators.
      assert list(remove(even, range(5))) == list(filter(odd, range(5)))
  
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 4 for calling a global function with example usage: test_remove() and returns: unknown, unknown