code: def test_filter(self):
      self.assertListEqual(
          list(
              py_builtins.filter_(lambda x: x == "b", ["a", "b", "c"])
          ),
          ["b"],
      )
      self.assertListEqual(
          list(py_builtins.filter_(lambda x: x < 3, [3, 2, 1])), [2, 1]
      )
  
imports: import unittest
  from nvidia.dali._autograph.core import converter
  from nvidia.dali._autograph.core import function_wrappers
  from nvidia.dali._autograph.operators import py_builtins
label_desc: Use image node_id 27 for calling the PyBuiltinsTest obj's underlying member method code with example usage: obj.test_filter() without return types