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要是有C++的const关键字就好了;-)
ASPN有个例子,Automating simple property creation ,http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/157768
可以参考一下.
  ----- Original Message ----- 
  From: moqiancong 
  To: python-chinese at lists.python.cn 
  Sent: Saturday, January 13, 2007 9:50 AM
  Subject: [python-chinese] 怎么不用property来实现只读属性？


  在python中，怎么样才能不用property来实现只读属性呢。
  我写程序的时候，总有一些只读的属性，但为了一个这样的属性，就得写一个函数，然后用property设成只读的，是不是有点太麻烦了呢？各位有什么更好的方案吗？

  -- 

  －－－－－－－－
  相信幸福，
  相信付出的努力！
  －－－－－－－－ 


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¼ÇµÃÇ°¼¸ÌìÖ£±òͬѧÎʹý¡¶ÔÚpythonÖÐҪʵÏÖÀàËÆdefineµÄ¹¦ÄÜÔõô°ì¡·£¬limodouÌá¹ýÓÃproperty¡£
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ÔÚ07-1-13£¬vcc <vcc在163.com> дµÀ£º
>
>  ÒªÊÇÓÐC++µÄconst¹Ø¼ü×־ͺÃÁË;-)
> ASPNÓиöÀý×Ó,Automating simple property creation ,
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/157768
> ¿ÉÒԲο¼Ò»ÏÂ.
>
> ----- Original Message -----
> *From:* moqiancong <moqiancong在gmail.com>
> *To:* python-chinese在lists.python.cn
> *Sent:* Saturday, January 13, 2007 9:50 AM
> *Subject:* [python-chinese] Ôõô²»ÓÃpropertyÀ´ÊµÏÖÖ»¶ÁÊôÐÔ£¿
>
> ÔÚpythonÖУ¬ÔõôÑù²ÅÄܲ»ÓÃpropertyÀ´ÊµÏÖÖ»¶ÁÊôÐÔÄØ¡£
>
> ÎÒд³ÌÐòµÄʱºò£¬×ÜÓÐһЩֻ¶ÁµÄÊôÐÔ£¬µ«ÎªÁËÒ»¸öÕâÑùµÄÊôÐÔ£¬¾ÍµÃдһ¸öº¯Êý£¬È»ºóÓÃpropertyÉè³ÉÖ»¶ÁµÄ£¬ÊDz»ÊÇÓеãÌ«Âé·³ÁËÄØ£¿¸÷λÓÐʲô¸üºÃµÄ·½°¸Âð£¿
>
> --
>
> £­£­£­£­£­£­£­£­
> ÏàÐÅÐÒ¸££¬
> ÏàП¶³öµÄŬÁ¦£¡
> £­£­£­£­£­£­£­£­
>
> ------------------------------
>
> _______________________________________________
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手册中推荐的方法是加两个'-'为前导

在07-1-13，moqiancong <moqiancong在gmail.com> 写道：
>
> 记得前几天郑彬同学问过《在python中要实现类似define的功能怎么办》，limodou提过用property。
> 但说实话，用这种方法对类中的只读属性来说，真的很麻烦。但那组邮件后来都成了讨论C/C++去了。晕倒。不得不单开个邮件来问这个问题。
>
> 谢谢vcc提供的这个方法。
>
> 在07-1-13， vcc <vcc在163.com> 写道：
> >
> >  要是有C++的const关键字就好了;-)
> > ASPN有个例子,Automating simple property creation ,http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/157768
> >
> > 可以参考一下.
> >
> >  ----- Original Message -----
> > *From:* moqiancong <moqiancong在gmail.com>
> > *To:* python-chinese在lists.python.cn
> > *Sent:* Saturday, January 13, 2007 9:50 AM
> > *Subject:* [python-chinese] 怎么不用property来实现只读属性？
> >
> >
> > 在python中，怎么样才能不用property来实现只读属性呢。
> >
> > 我写程序的时候，总有一些只读的属性，但为了一个这样的属性，就得写一个函数，然后用property设成只读的，是不是有点太麻烦了呢？各位有什么更好的方案吗？
> >
> > --
> >
> > －－－－－－－－
> > 相信幸福，
> > 相信付出的努力！
> > －－－－－－－－
> >
> > ------------------------------
> >
> > _______________________________________________
> > 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
> >
> >
> > _______________________________________________
> > 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
> >
>
>
>
> --
>
> －－－－－－－－
> 相信幸福，
> 相信付出的努力！
> －－－－－－－－
> _______________________________________________
> 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
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¿É²»¿ÉÒÔÔÚ__setattrº¯ÊýÀï×öһЩ´¦ÀíÄØ£¿

ÔÚ07-1-13£¬moqiancong <moqiancong在gmail.com> дµÀ£º
>
> ÔÚpythonÖУ¬ÔõôÑù²ÅÄܲ»ÓÃpropertyÀ´ÊµÏÖÖ»¶ÁÊôÐÔÄØ¡£
>
> ÎÒд³ÌÐòµÄʱºò£¬×ÜÓÐһЩֻ¶ÁµÄÊôÐÔ£¬µ«ÎªÁËÒ»¸öÕâÑùµÄÊôÐÔ£¬¾ÍµÃдһ¸öº¯Êý£¬È»ºóÓÃpropertyÉè³ÉÖ»¶ÁµÄ£¬ÊDz»ÊÇÓеãÌ«Âé·³ÁËÄØ£¿¸÷λÓÐʲô¸üºÃµÄ·½°¸Âð£¿
>
> --
>
> £­£­£­£­£­£­£­£­
> ÏàÐÅÐÒ¸££¬
> ÏàП¶³öµÄŬÁ¦£¡
> £­£­£­£­£­£­£­£­
> _______________________________________________
> python-chinese
> Post: send python-chinese在lists.python.cn
> Subscribe: send subscribe to python-chinese-request在lists.python.cn
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在__setattr__ 做手脚的话初始赋值会有问题

On 1/13/07, Gao Hong <joy.highland在gmail.com> wrote:
> 可不可以在__setattr函数里做一些处理呢？
>
>
> 在07-1-13，moqiancong <moqiancong在gmail.com> 写道：
> >
> > 在python中，怎么样才能不用property来实现只读属性呢。
> >
> 我写程序的时候，总有一些只读的属性，但为了一个这样的属性，就得写一个函数，然后用property设成只读的，是不是有点太麻烦了呢？各位有什么更好的方案吗？
> >
> > --
> >
> > －－－－－－－－
> > 相信幸福，
> > 相信付出的努力！
> > －－－－－－－－
> > _______________________________________________
> > 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
> >
>
>
>
> --
> It's a long journey to go!
> _______________________________________________
> 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
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>

ÄܾßÌåµØ˵һÏÂÂð£¿

2007/1/15, shhgs <shhgs.efhilt在gmail.com>:
>
> ÔÚ__setattr__ ×öÊֽŵĻ°³õʼ¸³Öµ»áÓÐÎÊÌâ
>
> On 1/13/07, Gao Hong <joy.highland在gmail.com> wrote:
> > ¿É²»¿ÉÒÔÔÚ__setattrº¯ÊýÀï×öһЩ´¦ÀíÄØ£¿
> >
> >
> > ÔÚ07-1-13£¬moqiancong <moqiancong在gmail.com> дµÀ£º
> > >
> > > ÔÚpythonÖУ¬ÔõôÑù²ÅÄܲ»ÓÃpropertyÀ´ÊµÏÖÖ»¶ÁÊôÐÔÄØ¡£
> > >
> >
> ÎÒд³ÌÐòµÄʱºò£¬×ÜÓÐһЩֻ¶ÁµÄÊôÐÔ£¬µ«ÎªÁËÒ»¸öÕâÑùµÄÊôÐÔ£¬¾ÍµÃдһ¸öº¯Êý£¬È»ºóÓÃpropertyÉè³ÉÖ»¶ÁµÄ£¬ÊDz»ÊÇÓеãÌ«Âé·³ÁËÄØ£¿¸÷λÓÐʲô¸üºÃµÄ·½°¸Âð£¿
> > >
> > > --
> > >
> > > £­£­£­£­£­£­£­£­
> > > ÏàÐÅÐÒ¸££¬
> > > ÏàП¶³öµÄŬÁ¦£¡
> > > £­£­£­£­£­£­£­£­
> > > _______________________________________________
> > > 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
> > >
> >
> >
> >
> > --
> > It's a long journey to go!
> > _______________________________________________
> > python-chinese
> > Post: send python-chinese在lists.python.cn
> > Subscribe: send subscribe to
> > python-chinese-request在lists.python.cn
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> >
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