[Python-Dev] cpython: asyncio: Fix CoroWrapper (fix my previous commit)

[Christian Heimes]

On 16.01.2014 16:57, Guido van Rossum wrote:
> Because somehow you can't have a slot named __doc__ *and* a docstring
> in the class. Try it. (I tried to work around this but didn't get very
> far.)

That's true for all class attributes. You can't have a slot and a class
attribute at the same time. After all the __doc__ string is stored in a
class attribute, too.

>>> class Example:
...     __slots__ = ("egg",)
...     # This doesn't work
...     egg = None
...
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: 'egg' in __slots__ conflicts with class variable


>>> class Example:
...     """doc"""
...     __slots__ = ("__doc__",)
...
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: '__doc__' in __slots__ conflicts with class variable