what is meaning of "@" in pyhon program.

[Bruno Desthuilliers]

Damon Getsman a écrit :
> Okay, maybe I just didn't understand the websites that were given as
> examples as to 'decoration'.  I first came across the unusual '@' when
> I was browsing through some extreme beginner's information on os.x
> method descriptions.  I asked some other people about it and they had
> no idea what it meant.  I don't _THINK_ that the decoration definition
> fits, though, because the examples that I saw it in had it prefixing
> an if conditional & a for loop.
> 
> ie:
> @if os.exists(foo):
>    etc
>    etc
> 
> and
> 
> @for blah:
>    etc
>    etc

This is not valid Python. period.