code: def test_ldexp_(self):
      self.run_test(
          "def ldexp_(a,b):\n from math import ldexp\n return ldexp(a,b)",
          3,
          4,
          ldexp_=[int, int],
      )
  
imports: from pythran.tests import TestEnv
label_desc: Use image node_id 24 for calling the TestMath obj's underlying member method code with example usage: obj.test_ldexp_() without return types