Mark Dickinson added the comment:

IMO, this is a horrible idea.  I'd hate for creation of a `namedtuple` class to 
fail just because there happened to be an existing (perhaps in an as-yet 
uncollected garbage `namedtuple` class with the same name).  That's the kind of 
spooky "action at a distance" that makes debugging unnecessarily difficult.

I also think this would be pretty much impossible to implement efficiently. :-)

I'm closing this report here: this behaviour is not a bug, and the suggested 
exception raising is (IMO) both undesirable and unworkable in practice.  I'd 
suggest opening a thread on the Python mailing-list if you want to discuss the 
idea further; if that thread produces a focused, widely accepted proposal, feel 
free to re-open an issue here.

----------
nosy: +mark.dickinson
resolution:  -> rejected
type: behavior -> enhancement

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue22563>
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