New assignmens ...
Chris Angelico
rosuav at gmail.com
Wed Oct 27 20:50:08 EDT 2021
On Thu, Oct 28, 2021 at 11:08 AM Avi Gross via Python-list
<python-list at python.org> wrote:
>
> Dave,
>
> You make me wonder about unintended side effects. Are we allowing the ++ and
> --- operations into Python through a side door?
>
class IncrementableInteger(int):
def __pos__(self): return HalfIncremented(self)
def __neg__(self): return HalfDecremented(self)
class HalfIncremented(IncrementableInteger):
def __pos__(self): return IncrementableInteger(self + 1)
class HalfDecremented(IncrementableInteger):
def __neg__(self): return IncrementableInteger(self - 1)
Up to you to make the actual mutation work but have fun making a
nightmare for subsequent maintainers!
ChrisA
PS. Nobody's ever stopping you from def __add_(self, other): return
self * other + 3
Just sayin'.
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