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Groups > comp.lang.python > #90561
| References | <25ba3a96-21ee-4a83-b7c1-8ac60508d30c@googlegroups.com> <mivmr0$1mb$1@r01.glglgl.de> <06301cb8-39a6-410b-9fad-afe6bd4d3217@googlegroups.com> <e09c84fe-609c-4794-a117-fc72c8ccf3ad@googlegroups.com> |
|---|---|
| From | Ian Kelly <ian.g.kelly@gmail.com> |
| Date | 2015-05-13 08:55 -0600 |
| Subject | Re: Basic misunderstanding on object creation |
| Newsgroups | comp.lang.python |
| Message-ID | <mailman.448.1431528969.12865.python-list@python.org> (permalink) |
On Wed, May 13, 2015 at 8:45 AM, andrew cooke <andrew@acooke.org> wrote:
>>>> class Foo:
> ... def __new__(cls, *args, **kargs):
> ... print('new', args, kargs)
> ... super().__new__(cls)
> ...
>>>> class Bar(Foo):
> ... def __init__(self, a):
> ... print('init', a)
> ...
>>>> Bar(1)
> new (1,) {}
>
> no "init" is printed.
You're not returning anything from Foo.__new__, so the result of the
constructor is None. None.__init__ does nothing.
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Basic misunderstanding on object creation andrew cooke <andrew@acooke.org> - 2015-05-13 06:25 -0700
Re: Basic misunderstanding on object creation Thomas Rachel <nutznetz-0c1b6768-bfa9-48d5-a470-7603bd3aa915@spamschutz.glglgl.de> - 2015-05-13 16:24 +0200
Re: Basic misunderstanding on object creation andrew cooke <andrew@acooke.org> - 2015-05-13 07:42 -0700
Re: Basic misunderstanding on object creation andrew cooke <andrew@acooke.org> - 2015-05-13 07:45 -0700
Re: Basic misunderstanding on object creation Peter Otten <__peter__@web.de> - 2015-05-13 16:55 +0200
Re: Basic misunderstanding on object creation Ian Kelly <ian.g.kelly@gmail.com> - 2015-05-13 08:55 -0600
Re: Basic misunderstanding on object creation andrew cooke <andrew@acooke.org> - 2015-05-13 08:52 -0700
Re: Basic misunderstanding on object creation Ian Kelly <ian.g.kelly@gmail.com> - 2015-05-13 08:54 -0600
Re: Basic misunderstanding on object creation Terry Reedy <tjreedy@udel.edu> - 2015-05-13 12:36 -0400
Re: Basic misunderstanding on object creation andrew cooke <andrew@acooke.org> - 2015-05-13 11:42 -0700
Re: Basic misunderstanding on object creation Terry Reedy <tjreedy@udel.edu> - 2015-05-13 15:17 -0400
Re: Basic misunderstanding on object creation Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-05-13 20:45 +0100
Re: Basic misunderstanding on object creation Ned Batchelder <ned@nedbatchelder.com> - 2015-05-13 13:33 -0700
Re: Basic misunderstanding on object creation Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-05-14 11:07 +1000
Re: Basic misunderstanding on object creation Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-05-13 17:38 +0100
Re: Basic misunderstanding on object creation Terry Reedy <tjreedy@udel.edu> - 2015-05-13 13:05 -0400
Re: Basic misunderstanding on object creation Terry Reedy <tjreedy@udel.edu> - 2015-05-13 13:13 -0400
Re: Basic misunderstanding on object creation Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-05-13 18:43 +0100
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