code: def test_unicode_(func, expected):
      assert str(Signature(func)) == expected
  
imports: from __future__ import division, print_function
  import re
  import pytest
  from sacred.config.signature import Signature
  from sacred.utils import MissingConfigError
label_desc: Use image node_id 35 for calling a global function with example usage: test_unicode_(func, expected) without return types