Exemplo n.º 1
0
 def append(self, child):
     """overridden to detect problems easily"""
     assert child not in self.parents()
     VNode.append(self, child)
Exemplo n.º 2
0
 def append(self, child):
     """overridden to detect problems easily"""
     assert child not in self.parents()
     VNode.append(self, child)