[Python-Dev] #pragmas in Python source code

[M.-A. Lemburg]

"Fred L. Drake, Jr." wrote:
> 
> M.-A. Lemburg writes:
>  > Hmm, anything else would introduce a new keyword, I guess. And
>  > new keywords cause new scripts to fail in old interpreters
>  > even when they don't use Unicode at all and only include
>  > <whatever the name is> per convention.
> 
>   Only if the new keyword is used in the script or anything it
> imports.  This is exactly like using new syntax (u'...') or new
> library features (unicode('abc', 'iso-8859-1')).

Right, but I would guess that people would then start using these
keywords in all files per convention (so as not to trip over
bugs due to wrong encodings).

Perhaps I'm overcautious here...

>   I can't think of anything that gets included "by convention" that
> breaks anything.  I don't recall a proposal that we should casually
> add pragmas to our scripts if there's no need to do so.  Adding
> pragmas to library modules is *not* part of the issue; they'd only be
> there if the version of Python they're part of supports the syntax.

-- 
Marc-Andre Lemburg
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