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[Python-Dev] Re: Call for defense of @decorators

Terry Reedy tjreedy at udel.edu
Thu Aug 5 22:48:06 CEST 2004 
"Ronald Oussoren"
>My particular use-case is PyObjC, which sometimes suffers from haveing
>veryLong_andSometimesAlsoVeryUgly_methodNames_. Having to repeat those
>three times when using a decorator is no fun.

I did not get this at first (see below).  I believe you mean more
specifically "Having to repeat those three times when using the old
no-special-deco-syntax post call is no fun."

"Bob Ippolito" followed with
> The alternative would be (current syntax and current PyObjC) this:
>
> def saveSheetDidDismiss_returnCode_contextInfo_(self, sheet,
> returnCode, contextInfo):
> pass
> saveSheetDidDismiss_returnCode_contextInfo_ =
> objc.selector(saveSheetDidDismiss_returnCode_contextInfo_,
> signature='v@:@i')

Aha!  Now I get it (perhaps for the second time in an extended discussion).

One argument for extended assignment was and is that not writing names,
especially long names, twice makes for easier reading and fewer bugs.  The
argument for not writing names *three* times, is even stronger.  If this
rationale against the status quo (which many objectors on c.l.py favor) is
not currently in the pep, I think it should be.

Terry J. Reedy
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