Decorators (was: Re: I love assert)
rriehle at itu.edu
Sat Nov 15 08:42:00 CET 2014
Thanks. I have only been using Python for about four years, so there are
features I have only recently discovered. Decorators are one of them. So
far, I encounter other Python users who are also unfamiliar with them.
When I discovered them, I instantly saw how they could be valuable.
Richard Riehle, PhD
Core Faculty, ITU
On Fri, Nov 14, 2014 at 6:36 PM, Mayank Tripathi <oquanox at gmail.com> wrote:
> Decorators were there in Python 2.4, released in 2005. Not exactly new.
> On Sat Nov 15 2014 at 7:51:11 AM Richard Riehle <rriehle at itu.edu> wrote:
>> On Friday, November 14, 2014 2:18:48 PM UTC-8, Marko Rauhamaa wrote:
>> > Richard Riehle <rriehle at itu.edu>:
>> > > I find that not a lot of Python user really appreciate the power of
>> > > decorators.
>> > Well, I don't.
>> > All it means is that I've never seen a use of decorators that has
>> > enhanced the code. Once I "see the light," I'll have no problem changing
>> > my view.
>> > Marko
>> Decorators are new in Python, so there are not a lot of people using
>> them. From my experience with other languages, especially Ada and Eiffel,
>> I enjoy the benefit of assertions (as pre-conditions and post-conditions
>> and invariants) at the specification level (not embedded in the code), so
>> decorators are closer to my other experience. They bring me closer to the
>> Design by Contract model of Ada and Eiffel. That is why I was so pleased
>> to see them added to Python.
>> It is true, however, that they are not immediately intutive in Python,
>> but once understood, they are handy IMHO for improving code reliability.
>> Perhaps I was spoiled by having this capability in some other languages.
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