RinKaMeAri wrote: > On Nov 11, 9:12 pm, Steve Holden <[EMAIL PROTECTED]> wrote: >> RinKaMeAri wrote: >>> Hi! >>> Could you imagine any way to block access to the base class public >>> methods? >>> Here is an example: >>> class B: >>> def public_method(): >>> pass >>> class A(B): >>> def public_a_method(): >>> pass >>> def a = A() >>> Is there any way to block the call a.public_method() without any >>> changes to B class? >>> Thank you! >> The simplest way would be to override B.public_method within A by >> defining A.public_method to raise a NotImplementedError or similar >> exception. Though of course this then begs the question of why A would >> need to subclass B in the first place, but I assume there would be >> methods you *did* want to implement. >> >> Perhaps more background would yield a better solution. >> >> regards >> Steve >> -- >> Steve Holden +1 571 484 6266 +1 800 494 3119 > > > Thanks, Steve! will do what you have proposed. > > It is just the stub example. Have been writing some tests for class > hierarchy and found the case when user can call the base method with > the derived instance and have problems :-) IMO, it is the class > design bug. Tried to play with __all__, setattr, getattr, but didn't > find any solution. > > BTW, what do you mean "to subclass B in the *first place*"?
It's just an expression. As in "I built A as a subclass of B, but since I overrode all B's methods in A there was no point making it a subclass in the first place". regards Steve -- Steve Holden +1 571 484 6266 +1 800 494 3119 Holden Web LLC http://www.holdenweb.com/ -- http://mail.python.org/mailman/listinfo/python-list
