code: def test_unicode_to_bytes():
      returned = py3k.to_bytes(UNICODE_STRING)
      _assert_strings_equal(BYTES_STRING, returned)
  
file_path: sumy/tests/test_utils/test_compat.py
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import pytest
  from sumy import _compat
label_desc: Use image node_id 4 for calling a global function with example usage: test_unicode_to_bytes() without return types