code: def test_List():
      l = List(2, 3, 4)
      assert l == List(2, 3, 4)
      assert str(l) == "[2, 3, 4]"
      x, y, z = symbols("x y z")
      l = List(x**2, y**3, z**4)
      # contrary to python's built-in list, we can call e.g. "replace" on List.
      m = l.replace(
          lambda arg: arg.is_Pow and arg.exp > 2,
          lambda p: p.base - p.exp,
      )
      assert m == [x**2, y - 3, z - 4]
      hash(m)
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_List() without return types