John wrote:
Hi,
I think I understand what decorators are and how they work. Maybe it's just
me but I don't know where I'd use them in my real world programming. I see
how they work with profile or coverage but does anyone have real world uses.
@classmethod, @staticmethod, @property, @abstractclass,
@abstractproperty are in my opinion the most import. Some toolkits use
them too.
I mostly create wxPython apps and don't see where they might apply.
The wx toolkit is designed to work with C++ and wxPython is just a
language binding for it. As far as I know C++ doesn't support Decorators
or something similar like it. So there won't be many uses for decorators
in wx apps.
I know the tutors will enlighten me!
Some ideas for decorators, if you want to play around with them:
@fireandforget
Make a function call in another thread, so you can return
immediately - without returning result. This could be for
example useful to send an email without needing to wait, until
it is sent.
@cache
Cache the results of a function in a dictionary. If the function
is called look up the value of the cache first. This only works
with side-effect free functions of course.
@timeout
Check if the execution time of a function exceeds a timeout
limit. If so raise an exception.
@ignoreexceptions
In my opinion, you should avoid using decorators in productive code, if
you don't have a good reason to do otherwise. Every decorator adds some
sort of "magic" to your program and using too much "magic" will make it
difficult to maintain.
- Patrick
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