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