[C++-sig] Dynamic resolution of members and methods

[Jérémie Delaitre]

It works ! Thanks a lot.

Jérémie

Alex Mohr a écrit :
> Override the python special methods __getattr__ or __getattribute__.
>
> http://docs.python.org/reference/datamodel.html#attribute-access
>
> Alex
>
> Jérémie Delaitre wrote:
>> Hello,
>>
>> I have a C++ class that use a custom property system.
>> This property system allows me to add and remove properties at runtime.
>>
>> I want to expose this class into Python.
>>
>> The problem is: I want "a dynamic resolution" of the properties in 
>> Python.
>>
>> For example:
>>
>> # import my python extension
>> import myModule
>>
>> # get an instance of my C++ class
>> t = myModule.newInstance()
>>
>> # access the property 'myProperty'
>> print(t.myProperty)
>>
>> When I access the property, I want python to call a "callback" of 
>> mine (written
>> in the C++ extension) which will check if the requested property 
>> exists, and
>> if it does, return the corresponding value, otherwise generate an 
>> exception.
>>
>> By looking at the python C API, I did not find a way to achieve this. 
>> It seems
>> that declaring a new type requires to have static arrays for members 
>> and methods
>> (yes, my property system allows me to declare new methods too, so I 
>> want to expose
>> them with a similar system).
>>
>> Any idea how I could resolve this (with Python3.0) ?
>>
>> Regards,
>>
>> Jérémie Delaitre
>>
>>
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