[Tutor] [Edited] Plug-in enabled Program

[Daniele]

> ---------- Messaggio inoltrato ----------
> From: "Alan Gauld" <alan.gauld at btinternet.com>
> To: tutor at python.org
> Subject: Re: [Tutor] Tutor Digest, Vol 61, Issue 3
>
> OK, To do that you need to provide an intrerface in your code
> that the plug-in can use. That is to say you must call a documented
> set of functions/methods and then arrange your code such that the
> plugin can replace the default code.

Thank you Alan, that's what I wanted :)
I've understood the idea, and I'll investigate it. The only doubt I
have is how to adapt it to multiple plugins related to the same
interface.
Let's say my program downloads a file from a url and saves it in a
local directory.
One plugin could be written to add a prefix to the file name and
another one to make the filename all-caps.
In this case the same interface (let's call it "ManageFileName")
should be used twice (or, in general, many times), and it's not simple
to decide a priori how to merge the two actions. This lets me think
about decorators, is that a possibility?
Each user could write it's own decorator to the "setFileName()" method
and the program will use them together.
As I don't know decorators in python at all, I'm not sure this could
work out, but it could be a nice push to start learning :)