code: def test_extend_(self):
      self.run_test(
          "def extend_(a):\n b=[1,2,3]\n b.extend(a)\n return b",
          [1.2],
          extend_=[List[float]],
      )
  
imports: from pythran.tests import TestEnv
  from pythran.typing import List, NDArray
  import numpy
label_desc: Use image node_id 3 for calling the TestList obj's underlying member method code with example usage: obj.test_extend_() without return types