code: def test_str_empty(self):
      self.run_test(
          "def str_empty(s0): return '>o_/' if s0 else '0x0'",
          "",
          str_empty=[str],
      )
  
imports: from pythran.tests import TestEnv
  from pythran.typing import List
  import unittest
label_desc: Use image node_id 6 for calling the TestStr obj's underlying member method code with example usage: obj.test_str_empty() without return types