On Fri, Apr 1, 2016 at 11:14 AM, Matthias welp <boekew...@gmail.com> wrote: >> An example of the transformation would help here > > An example, that detects cycles in a graph, and doesn't do an update if > the graph has cycles.
Thanks. > class A(object): > def __init__(self, parent): > @prevent_cycles > self.parent = parent I think you'll find that this doesn't work. Properties are members of the class, not of instances of the class. > This would prevent cycles from being created in this object A, and would > make > some highly reusable code. The same can be done for @not_none, etc, to > prevent > some states which may be unwanted. But you could accomplish the same thing with "self.parent = prevent_cycles(parent)". So I'm still not seeing how the use of the decorator syntax eliminates repetition. -- https://mail.python.org/mailman/listinfo/python-list
