code: def test_syntactical_future_repl(self):
      p = spawn_python("-i")
      p.stdin.write(b"from __future__ import barry_as_FLUFL\n")
      p.stdin.write(b"2 <> 3\n")
      out = kill_python(p)
      self.assertNotIn(b"SyntaxError: invalid syntax", out)
  
imports: import __future__
  import ast
  import unittest
  from test.support import import_helper
  from test.support.script_helper import spawn_python, kill_python
  from textwrap import dedent
  import os
  import re
  import sys
label_desc: Use image node_id 18 for calling the FutureTest obj's underlying member method code with example usage: obj.test_syntactical_future_repl() without return types