Re: Magiczne dzieci

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#27508

From: Piotr Husiatynski
Date: Fri, 11 Jun 2010 06:50

31 lines
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Dnia 11.06.2010 Artur M. Piwko <milusi.pysiaczek@buziaczek.pl> napisał/a:
> In the darkest hour on Thu, 10 Jun 2010 23:09:26 +0200,
> Wojciech Muła <wojciech_mula@poczta.null.onet.pl.invalid> screamed:
>>> class A(object):
>>>     def __init__(self, name=None, children={}):
>>>         self.name = name
>>           print id(children)
>>>         self.children = children
>>           print id(self.children)
>>
>> Jak uruchomisz, zobaczysz, że wszystkie instancje klasy dostają
>> ten sam obiekt słownika i na nim operują. Spróbuj dać na początku
>>
>> import copy
>>
>> a w konstruktorze
>>
>> 	self.children = copy.copy(children)
>>
>
> Albo:
>
> def __init__(self, name=None, children=None):
>     self.children = {} if children is None else children
>

def __init__(self, name=None, children=None):
    self.children = children or {}

-- 
Piotr Husiatyński

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Path: mbox-mo1.pugleaf.net!news-archive.icm.edu.pl!news.icm.edu.pl!wsisiz.edu.pl!not-for-mail
From: Piotr Husiatynski <husio@gmail.com>
Newsgroups: pl.comp.lang.python
Subject: Re: Magiczne dzieci
Date: Fri, 11 Jun 2010 06:50:13 +0000 (UTC)
Organization: WSISiZ
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