code: def test_Standard_Cartan():
      c = CartanType("A4")
      assert c.rank() == 4
      assert c.series == "A"
      m = Standard_Cartan("A", 2)
      assert m.rank() == 2
      assert m.series == "A"
      b = CartanType("B12")
      assert b.rank() == 12
      assert b.series == "B"
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_Standard_Cartan() without return types