is it possible to see if a class has a decorator ?

[Stef Mientki]

On 06-12-2010 16:04, Jean-Michel Pichavant wrote:
> Stef Mientki wrote:
>> On 06-12-2010 12:08, Ben Finney wrote:
>>> Stef Mientki <stef.mientki at gmail.com> writes:
>>>
>>>    
>>>> I would like to know if a class definition has a decorator,
>>>>       
>>> I'm not sure what this question means.
>>>
>>> Applying a decorator to a class definition produces a normal class.
>>>
>>> Classes don't “have” decorators; classes can be returned by a decorator
>>> function, but AFAIK the resulting class doesn't “have” the decorator in
>>> any sense.
>>>
>>>    
>>>> is that possible ?
>>>>       
>>> The return value of a decorator isn't special in any way, AFAIK.
>>>
>>> Any function can return a class object or a function object, and any
>>> function can be used as a decorator.
>>>
>>> The only thing that makes a function a decorator is how it is used in
>>> the code; but it doesn't leave a trace that I know of.
>>>
>>> Now, what is it you're trying to do? Perhaps there's a better solution
>>> we can come up with.
>>>
>>>     
>> Thanks Ben,
>> here some more explanation.
>>
>> I've a number of (dynamic) applications,
>> launched from a central wrapper.
>> All these modules have a class "Start", which launches the application and embeds them in the
>> wrapper application.
>>
>> Module 1:
>> class Start ():
>>     ....
>>
>> Module 2:
>> @auth
>> class Start ():
>>     ...
>>
>> When the wrapper application is started, it looks for all dynamic modules (without importing them),
>> and list these application in a hierarchical tree.
>> In the above axmple,
>> I would like to know that the class "Start" in Module 2 has the decorator  "Auth", *without
>> importing the module*,
>> (so depending on the user logged in, I can decide to add or not add the module to the
>> hierarchical tree).
>>
>> thanks,
>> Stef Mientki
>>
>>
>>
>>  
> You best bet is to parse the source file.
thanks, I was afraid of that.
cheers,
Stef
>
> JM