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