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Groups > comp.lang.python > #99753
| From | Terry Reedy <tjreedy@udel.edu> |
|---|---|
| Newsgroups | comp.lang.python |
| Subject | Re: static variables |
| Date | 2015-11-30 12:38 -0500 |
| Message-ID | <mailman.46.1448905207.14615.python-list@python.org> (permalink) |
| References | <n3i06o$9ot$1@news2.informatik.uni-stuttgart.de> |
On 11/30/2015 12:15 PM, Ulli Horlacher wrote:
>
> I try to to implement a "static variable" inside a function:
>
> def main():
> a(1)
> a(2)
> a()
> print(a.x)
> if 'a.x' in globals(): print('global variable')
> if 'a.x' in locals(): print('local variable')
>
> def a(x=None):
> if not x is None: a.x = x
> print(':',a.x)
>
> main()
>
> When I run this code, I get:
>
> : 1
> : 2
> : 2
> 2
>
> This is exactly what I expect.
> But what is a.x?
> It is neither a variable in globals() nor in locals()
a.x is an attribute of the object a.
--
Terry Jan Reedy
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static variables Ulli Horlacher <framstag@rus.uni-stuttgart.de> - 2015-11-30 17:15 +0000
Re: static variables Terry Reedy <tjreedy@udel.edu> - 2015-11-30 12:38 -0500
Re: static variables BartC <bc@freeuk.com> - 2015-11-30 20:32 +0000
Re: static variables Steven D'Aprano <steve@pearwood.info> - 2015-12-01 12:01 +1100
Re: static variables Ulli Horlacher <framstag@rus.uni-stuttgart.de> - 2015-12-01 08:26 +0000
Re: static variables Peter Otten <__peter__@web.de> - 2015-12-01 10:01 +0100
Re: static variables Grobu <snailcoder@retrosite.invalid> - 2015-12-01 10:15 +0100
Re: static variables Steven D'Aprano <steve@pearwood.info> - 2015-12-02 12:02 +1100
Re: static variables Erik <python@lucidity.plus.com> - 2015-12-02 01:16 +0000
Re: static variables Steven D'Aprano <steve@pearwood.info> - 2015-12-02 12:24 +1100
Re: static variables Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2015-12-02 09:21 +0100
Re: static variables Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2015-12-02 09:34 +0100
Re: static variables Steven D'Aprano <steve@pearwood.info> - 2015-12-02 21:22 +1100
Re: static variables Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2015-12-02 12:09 +0100
Re: static variables Steven D'Aprano <steve@pearwood.info> - 2015-12-03 00:11 +1100
Re: static variables Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2015-12-02 14:41 +0100
Re: static variables Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-12-02 13:48 +0000
Re: static variables Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2015-12-02 15:07 +0100
Re: static variables Ian Kelly <ian.g.kelly@gmail.com> - 2015-12-02 08:15 -0600
Re: static variables Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-12-02 14:31 +0000
Re: static variables Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2015-12-02 16:30 +0100
Re: static variables Ian Kelly <ian.g.kelly@gmail.com> - 2015-12-02 14:30 -0600
Re: static variables Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2015-12-03 10:06 +0100
Re: static variables Chris Angelico <rosuav@gmail.com> - 2015-12-02 20:23 +1100
Re: static variables Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2015-12-02 10:47 +0100
Re: static variables Marko Rauhamaa <marko@pacujo.net> - 2015-12-02 12:18 +0200
Re: static variables Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2015-12-02 11:56 +0100
Re: static variables Marko Rauhamaa <marko@pacujo.net> - 2015-12-02 13:30 +0200
Re: static variables Steven D'Aprano <steve@pearwood.info> - 2015-12-03 00:17 +1100
Re: static variables Wolfgang Maier <wolfgang.maier@biologie.uni-freiburg.de> - 2015-12-01 10:58 +0100
Re: static variables Ulli Horlacher <framstag@rus.uni-stuttgart.de> - 2015-12-01 11:47 +0000
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