Doctests and decorated methods don't get along

[Steven D'Aprano]

On Sat, 06 Feb 2010 14:39:00 -0500, Terry Reedy wrote:

> On 2/6/2010 6:48 AM, Steven D'Aprano wrote:
>> It seems that doctest doesn't discover or execute doctests in methods
>> which have been decorated.

[...]

> Doctest has to scan the dict, so it does not see the attribute-lookup
> result.

Ahaha, now we're getting somewhere. If I do this:

>>> import inspect
>>> import test_doctests
>>> method3 = test_doctests.Test.__dict__['method3']
>>> inspect.isfunction(method3)
False
>>> inspect.ismethod(method3)
False

But:

>>> inspect.ismethoddescriptor(method3)
True

which is what I want to see. Presumably doctest.DocTestFinder needs a 
patch to call methoddescriptor's __get__ method.

(BTW, classmethod, staticmethod and property are all special-cased by 
DocTestFinder.)



-- 
Steven