Esempio n. 1
0
 def _dump(self, stream):
     """
     Concrete subclasses must override this to implement the dump method.
     """
     raise not_implemented_error(self, type(self)._dump)
Esempio n. 2
0
 def _combine(self, other):
     """
     Concrete subclasses must override this to implement the combine method.
     """
     raise not_implemented_error(self, type(self)._combine)