message: python2.7 compatiblity
diff: @@ -26,8 +26,6 @@ class HdlName(str):
  after parsing)
  """
  - __slots__ = ["obj"]
  -
  def __init__(self, *args, **kwargs):
  obj = kwargs.pop("obj", None)
  super(HdlName, self).__init__()
  