Message 179236 - Python tracker

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In-reply-to
Author	chris.jerdonek
Recipients	bethard, chris.jerdonek, r.david.murray
Date	2013年01月06日.23:02:01
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1357513321.14.0.853428224677.issue16878@psf.upfronthosting.co.za>

Content
I agree it would be very likely to break working code. Can you elaborate on your point about 'append' though? I'm not sure I see it. Aside from consistency, I'm wondering if there is ever a case where it would help to return None for positional arguments. For example, unlike with optional arguments, it doesn't seem like it would ever make sense to distinguish between the option being present and the option being present with no values (which is why const is needed in the optional case). In other words, there is no loss of information by returning [].

Content

I agree it would be very likely to break working code. Can you elaborate on your point about 'append' though? I'm not sure I see it.
Aside from consistency, I'm wondering if there is ever a case where it would help to return None for positional arguments. For example, unlike with optional arguments, it doesn't seem like it would ever make sense to distinguish between the option being present and the option being present with no values (which is why const is needed in the optional case). In other words, there is no loss of information by returning [].

History
Date	User	Action	Args
2013年01月06日 23:02:01	chris.jerdonek	set	recipients: + chris.jerdonek, bethard, r.david.murray
2013年01月06日 23:02:01	chris.jerdonek	set	messageid: <1357513321.14.0.853428224677.issue16878@psf.upfronthosting.co.za>
2013年01月06日 23:02:01	chris.jerdonek	link	issue16878 messages
2013年01月06日 23:02:01	chris.jerdonek	create

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