code: def unary_op(op):
      def test_bin_op(self):
          self.assertSame("(%sb)" % (op,))
  
      return test_bin_op
  
imports: from __future__ import print_function
  from __future__ import division
  from __future__ import absolute_import
  import unittest
  import ast
  from ...asttools.visitors.pysourcegen import SourceGen
  from ...asttools.tests import AllTypesTested
  from ...testing import py2only, py3only
label_desc: Use image node_id 3 for calling a global function with example usage: unary_op(op) and returns: test_bin_op