My fight with classes :)
Bruno Desthuilliers
bruno.42.desthuilliers at websiteburo.invalid
Fri Jun 13 04:39:01 EDT 2008
TheSaint a écrit :
> On 17:47, giovedì 12 giugno 2008 Bruno Desthuilliers wrote:
>
>>>> For multiple functions, use classes.
>> Well... Closures are poor men's objects, or so they say (or is that the
>> other way round ?-).
>
> Well, I'd like to know what could be the reason to design a single-call class
> instead of a similar function.
Convenience. FWIW, in Python, functions are objects, and when you use a
closure to maintain state, you in fact already use the function's class
features. Sometimes, it's just simpler and more straightforward to use a
custom callable object than closures. Two common examples are function
decorators taking arguments (which require "two levels" closures if you
want to define them as functions, something that the instanciation/call
scheme of a callable class handles naturally) and partial application.
More information about the Python-list
mailing list