引用计数是不是对NULL也是需要的？譬如：
PyObject *Var = NULL;
这个时候是不是要对Var进行Py_INCREF()的操作？


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我猜是不需要，

指针谁也没指，没什么意义。

引用计数是对对象计数吧， 跟指针没关系。


On 7/17/06, Gerald Lee <leejd80 at gmail.com> wrote:
>
> 引用计数是不是对NULL也是需要的？譬如：
> PyObject *Var = NULL;
> 这个时候是不是要对Var进行Py_INCREF()的操作？
>
>
> --
> My Blog >> http://leejd.cndev.org
> My QQ >> 9847243
>
> _______________________________________________
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嗯，没错，引用计数对Python中的对象才有意义，跟指针没有关系的 ：）

On 7/17/06, lubiao <lubiao.py at gmail.com> wrote:
>
>  我猜是不需要，
>
> 指针谁也没指，没什么意义。
>
> 引用计数是对对象计数吧， 跟指针没关系。
>
>
>  On 7/17/06, Gerald Lee <leejd80 at gmail.com> wrote:
>
> > 引用计数是不是对NULL也是需要的？譬如：
> PyObject *Var = NULL;
> 这个时候是不是要对Var进行Py_INCREF()的操作？
>
>
> --
> My Blog >> http://leejd.cndev.org
> My QQ >> 9847243
>
> _______________________________________________
> python-chinese
> Post: send python-chinese at lists.python.cn
> Subscribe: send subscribe to python-chinese-request at lists.python.cn
> Unsubscribe: send unsubscribe to   python-chinese-request at lists.python.cn
> Detail Info: http://python.cn/mailman/listinfo/python-chinese
>
>
>
>
> _______________________________________________
> python-chinese
> Post: send python-chinese at lists.python.cn
> Subscribe: send subscribe to python-chinese-request at lists.python.cn
> Unsubscribe: send unsubscribe to  python-chinese-request at lists.python.cn
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>


-- 
Robert
Python源码剖析――http://blog.donews.com/lemur/
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