doctest and decorators

Daniel Larsson daniel.j.larsson at gmail.com
Wed Sep 5 02:15:21 CEST 2007


On 9/5/07, Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
>
> En Tue, 04 Sep 2007 19:29:11 -0300, Daniel Larsson
> <daniel.j.larsson at gmail.com> escribi�:
>
> > On 9/5/07, Ferenczi Viktor <python at cx.hu> wrote:
> >>
> >> > > @functools.wraps(f)
> >> > > Pass the function to be wrapped by the decorator to the wraps
> >> function.
> >> > Ooops, right. That doesn't change the fact that decorated functions
> >> get
> >> > hidden from doctest though.
> >
> >
> > I have no issue when the decorator is defined in the same module as the
> > decorated function, my problem is running doctests on functions using an
> > imported decorator. Having to implement the decorator in every source
> > module
> > isn't very practical. Try splitting your module in two, as I did, and
> run
> > with -v, and you'll see the problem.
>
> Looks like a bug. doctest is failing to recognize that the decorated
> function belongs to the module being tested.
>
> A simple patch: In doctest.py, method _from_module, near line 840, you
> have these lines:
>
>          elif inspect.getmodule(object) is not None:
>              return module is inspect.getmodule(object)
>
> Move them up, just before the line:
>
>          elif inspect.isfunction(object):


Yes, that was basically what I did as well. It makes much more sense to
check __module__ first (which is modifiable) rather than func_globals (which
obviously isn't).

I would have guessed the inspect.getmodule check would cover the isclass
test as well (?)

This works fine in this case, but I'm not sure whether this breaks in
> other circumstances (but I can't think of a case when using
> inspect.getmodule() would not be appropiate).
>
> PS: I can't see any tests for decorated functions (except
> @classmethod/@staticmethod) in the library test suite. I'll try to add
> some and submit a patch.
>
> --
> Gabriel Genellina
>
> --
> http://mail.python.org/mailman/listinfo/python-list
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