以下是输出：

Traceback (most recent call last):
File "D:\work\feednow\RssTree.py", line 291, in OnSelChanged
index, itemType, prefix = self.tree.GetPyData(item)
File
"C:\Python24\Lib\site-packages\wx-2.5.3-msw-unicode\wx\_controls.py",
line 5137, in GetItemPyData
return _controls_.TreeCtrl_GetItemPyData(*args, **kwargs)
wx._core.PyAssertionError: C++ assertion "wxAssertFailure" failed in
..\..\src\msw\treectrl.cpp(1166): invalid tree item

这是在OnSelChanged中对应的代码：
item = event.GetItem()
index, itemType, prefix = self.tree.GetPyData(item)

为什么会出现这种问题呢

item是否是有效项?

DreamY 写道:
> 以下是输出：
> 
> Traceback (most recent call last):
> File "D:\work\feednow\RssTree.py", line 291, in OnSelChanged
> index, itemType, prefix = self.tree.GetPyData(item)
> File
> "C:\Python24\Lib\site-packages\wx-2.5.3-msw-unicode\wx\_controls.py",
> line 5137, in GetItemPyData
> return _controls_.TreeCtrl_GetItemPyData(*args, **kwargs)
> wx._core.PyAssertionError: C++ assertion "wxAssertFailure" failed in
> ..\..\src\msw\treectrl.cpp(1166): invalid tree item
> 
> 这是在OnSelChanged中对应的代码：
> item = event.GetItem()
> index, itemType, prefix = self.tree.GetPyData(item)
> 
> 为什么会出现这种问题呢
> 
> _______________________________________________
> python-chinese list
> python-chinese at lists.python.cn
> http://python.cn/mailman/listinfo/python-chinese
> 
> 

是的，只是在OnSelChanged这个函数里面有问题，其他的如OnLeftClick等都是正
确的。
而且，OnSelChanged也能正常的完成任务。

0.706 写道:

>item是否是有效项?
>
>DreamY 写道:
>  
>
>>以下是输出：
>>
>>Traceback (most recent call last):
>>File "D:\work\feednow\RssTree.py", line 291, in OnSelChanged
>>index, itemType, prefix = self.tree.GetPyData(item)
>>File
>>"C:\Python24\Lib\site-packages\wx-2.5.3-msw-unicode\wx\_controls.py",
>>line 5137, in GetItemPyData
>>return _controls_.TreeCtrl_GetItemPyData(*args, **kwargs)
>>wx._core.PyAssertionError: C++ assertion "wxAssertFailure" failed in
>>..\..\src\msw\treectrl.cpp(1166): invalid tree item
>>
>>这是在OnSelChanged中对应的代码：
>>item = event.GetItem()
>>index, itemType, prefix = self.tree.GetPyData(item)
>>
>>为什么会出现这种问题呢
>>
>>_______________________________________________
>>python-chinese list
>>python-chinese at lists.python.cn
>>http://python.cn/mailman/listinfo/python-chinese
>>
>>
>>    
>>
>
>_______________________________________________
>python-chinese list
>python-chinese at lists.python.cn
>http://python.cn/mailman/listinfo/python-chinese
>
>
>  
>