code: def test_unaffected_global(self):
      global for_unaffected_global
      for_unaffected_global = 3
  
      def f(i):
          global for_unaffected_global
          if i == 0:
              for_unaffected_global = i - 1
          return for_unaffected_global
  
      self.assertTransformedResult(f, 1, 3)
      self.assertTransformedResult(f, 0, -1)
      self.assertEqual(for_unaffected_global, -1)
  
imports: import collections
  from nvidia.dali._autograph.converters import break_statements
  from nvidia.dali._autograph.converters import continue_statements
  from nvidia.dali._autograph.converters import control_flow
  from nvidia.dali._autograph.core import converter_testing
  from nvidia.dali._autograph.utils.all_utils import custom_constant
label_desc: Use image node_id 13 for calling the IfStatementTest obj's underlying member method code with example usage: obj.test_unaffected_global() and returns: for_unaffected_global