>>> class abc:
	pass
>>> t=abc()
>>> t.x=1  <= 这里x变量根本就没有在abc类里面定义过，怎么就直接能用了呢？
>>> print t.x

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set_attrÁË.
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jxppp.liu
2006-10-14



·¢¼þÈË£º feihu_roger
·¢ËÍʱ¼ä£º 2006-10-14 12:04:46
ÊÕ¼þÈË£º python-chinese在lists.python.cn
³­ËÍ£º 
Ö÷Ì⣺ [python-chinese]¶ÔÀàµÄÕâ¸öÓï·¨²»ÊǺÜÄÜÀí½â

> > > class abc:
pass
> > > t=abc()
> > > t.x=1   <= ÕâÀïx±äÁ¿¸ù±¾¾ÍûÓÐÔÚabcÀàÀïÃ涨Òå¹ý£¬Ôõô¾ÍÖ±½ÓÄÜÓÃÁËÄØ£¿
> > > print t.x

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On 10/14/06, feihu_roger <feihu_roger在yahoo.com.cn> wrote:
> >>> class abc:
>         pass
> >>> t=abc()
> >>> t.x=1  <= 这里x变量根本就没有在abc类里面定义过，怎么就直接能用了呢？
> >>> print t.x
>
类的属性可以动态生成。

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UliPad <>: http://wiki.woodpecker.org.cn/moin/UliPad
My Blog: http://www.donews.net/limodou

主意区别一下。
>>> class abc:
...     pass
...
>>> abc.x=1
>>> print abc.x
1
>>> t=abc()
>>> t.x=2
>>> print t.x
2
>>> print abc.x
1
>>>

On 10/14/06, limodou <limodou在gmail.com> wrote:
>
> On 10/14/06, feihu_roger <feihu_roger在yahoo.com.cn> wrote:
> > >>> class abc:
> >         pass
> > >>> t=abc()
> > >>> t.x=1  <= 这里x变量根本就没有在abc类里面定义过，怎么就直接能用了呢？
> > >>> print t.x
> >
> 类的属性可以动态生成。
>
> --
> I like python!
> UliPad <>: http://wiki.woodpecker.org.cn/moin/UliPad
> My Blog: http://www.donews.net/limodou
> _______________________________________________
> python-chinese
> Post: send python-chinese在lists.python.cn
> Subscribe: send subscribe to python-chinese-request在lists.python.cn
> Unsubscribe: send unsubscribe to  python-chinese-request在lists.python.cn
> Detail Info: http://python.cn/mailman/listinfo/python-chinese




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  ※※我思故我在※※
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¸üÏêϸµÄ¡£¿ÉÒÔÓÃdir ¿´¿´±ä»¯µÄ¡£
>>> class abc:
...     pass
... 
>>> print abc.x
Traceback (most recent call last):
  File "", line 1, in ?
AttributeError: class abc has no attribute 'x'
>>> x=abc()
>>> print x.x
Traceback (most recent call last):
  File "", line 1, in ?
AttributeError: abc instance has no attribute 'x'
>>> x.x=1
>>> print x.x
1
>>> abc.x=2
>>> print abc.x
2
>>> c=abc()
>>> print c.x
2
>>> dir(abc)
['__doc__', '__module__', 'x']
>>> dir(c)
['__doc__', '__module__', 'x']




jxppp.liu
2006-10-14



·¢¼þÈË£º Linker Lin
·¢ËÍʱ¼ä£º 2006-10-14 14:09:49
ÊÕ¼þÈË£º python-chinese在lists.python.cn
³­ËÍ£º 
Ö÷Ì⣺ Re: [python-chinese]¶ÔÀàµÄÕâ¸öÓï·¨²»ÊǺÜÄÜÀí½â

Ö÷ÒâÇø±ðһϡ£
>>> class abc:
...     pass
... 
>>> abc.x=1
>>> print abc.x
1
>>> t=abc()
>>> t.x=2
>>> print t.x
2
>>> print abc.x
1
>>> 


On 10/14/06, limodou <limodou在gmail.com> wrote:
On 10/14/06, feihu_roger <feihu_roger在yahoo.com.cn> wrote:
> >>> class abc:
>         pass
> >>> t=abc()
> >>> t.x=1  <= ÕâÀïx±äÁ¿¸ù±¾¾ÍûÓÐÔÚabcÀàÀïÃ涨Òå¹ý£¬Ôõô¾ÍÖ±½ÓÄÜÓÃÁËÄØ£¿ 
> >>> print t.x
>
ÀàµÄÊôÐÔ¿ÉÒÔ¶¯Ì¬Éú³É¡£

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My Blog: http://www.donews.net/limodou
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