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Re: NoneType and new instances

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From Terry Reedy <tjreedy@udel.edu>
Subject Re: NoneType and new instances
Date Sat, 30 Jul 2011 09:35:58 -0400
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Xref x330-a1.tempe.blueboxinc.net comp.lang.python:10578

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Ethan's proposal was accepted on python-ideas. In Python 3.3, the 
classes for the singletons None, Ellipsis, and NotImplemented will be 
callables that return the singleton.

It turns out that the reason an exception is now raised is that there 
currently is no .__new__ method, so an exception is raised by default. 
.__new__ methods returning the singleton have been added.

Terry Jan Reedy

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Thread

NoneType and new instances Ethan Furman <ethan@stoneleaf.us> - 2011-07-28 08:39 -0700
  Re: NoneType and new instances Billy Mays <81282ed9a88799d21e77957df2d84bd6514d9af6@myhashismyemail.com> - 2011-07-28 11:34 -0400
  Re: NoneType and new instances Ben Finney <ben+python@benfinney.id.au> - 2011-07-29 07:46 +1000
    Re: NoneType and new instances Ethan Furman <ethan@stoneleaf.us> - 2011-07-28 15:26 -0700
      Re: NoneType and new instances Ben Finney <ben+python@benfinney.id.au> - 2011-07-29 09:52 +1000
  Re: NoneType and new instances Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-07-29 11:16 +1000
    Re: NoneType and new instances Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2011-07-30 14:50 +1200
      Re: NoneType and new instances Terry Reedy <tjreedy@udel.edu> - 2011-07-30 09:35 -0400
      Re: NoneType and new instances python@bdurham.com - 2011-07-30 11:43 -0400
  Re: NoneType and new instances "bruno.desthuilliers@gmail.com" <bruno.desthuilliers@gmail.com> - 2011-07-30 09:39 -0700
    Re: NoneType and new instances Terry Reedy <tjreedy@udel.edu> - 2011-07-30 23:34 -0400
      Re: NoneType and new instances Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-07-31 14:28 +1000

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