code: def test_str_failed_conversion(self):
      self.run_test(
          "def str_failed_conversion(s):\n try: return int(s)\n except: return 42",
          "prout",
          str_failed_conversion=[str],
      )
      self.run_test(
          "def str_failed_conversion_a(s):\n try: return int(s[0])\n except: return 42",
          "prout",
          str_failed_conversion_a=[str],
      )
  
imports: from pythran.tests import TestEnv
  from pythran.typing import List
  import unittest
label_desc: Use image node_id 7 for calling the TestStr obj's underlying member method code with example usage: obj.test_str_failed_conversion() without return types