code: def test_str_join1(self):
      self.run_test(
          "def str_join1(): a = ['l', 'l'] ; return 'o'.join(a)",
          str_join1=[],
      )
  
imports: from pythran.tests import TestEnv
  from pythran.typing import List
  import unittest
label_desc: Use image node_id 33 for calling the TestStr obj's underlying member method code with example usage: obj.test_str_join1() without return types