code: def test_axis_str():
      i = C.sequence.input_variable((1, 3))
      assert str(C.Axis.all_axes()) == "Axis('AllAxes')"
      assert str(C.Axis.all_static_axes()) == "Axis('AllStaticAxes')"
      assert (
          str(C.Axis.unknown_dynamic_axes()) == "(Axis('UnknownAxes'),)"
      )
      assert str(C.Axis(1)) == "Axis('staticAxisIdx=1')"
      assert str(C.Axis(-1)) == "Axis('staticAxisIdx=-1')"
      assert (
          str(i.dynamic_axes)
          == "(Axis('defaultBatchAxis'), Axis('defaultDynamicAxis'))"
      )
  
imports: import cntk
label_desc: Use image node_id 5 for calling a global function with example usage: test_axis_str() without return types