code: def test_log_(self):
      self.run_test(
          "def log_(a):\n from math import log\n return log(a)",
          1,
          log_=[int],
      )
  
imports: from pythran.tests import TestEnv
label_desc: Use image node_id 21 for calling the TestMath obj's underlying member method code with example usage: obj.test_log_() without return types