David Isaac wrote: > 1. "Without a __dict__ variable, > instances cannot be assigned new variables not listed in the __slots__ > definition." > > So this seemed an interesting restriction to impose in some instances, > but I've noticed that this behavior is being called by some a side effect > the reliance on which is considered unPythonic. Why?
If you want to restrict attribute asignment, you should use the __setattr__ special method, see: http://docs.python.org/ref/attribute-access.html > 2. What is a simple example where use of slots has caused "subtle" problems, > as some claim it will? The first point is true only if all bases use __slots__: >>> class A(object): ... pass ... >>> class B(A): ... __slots__ = ('spam',) ... >>> b = B() >>> b.eggs = 1 >>> b.eggs 1 > 3. What is a simple example of a Pythonic use of __slots__ that does NOT > involved the creation of **many** instances. > > Thanks, > Alan Isaac Ziga -- http://mail.python.org/mailman/listinfo/python-list
