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Groups > comp.lang.python > #18523
| References | <13ac20bc-e8b0-4697-8dfd-9fa003af2a48@a17g2000yqj.googlegroups.com> |
|---|---|
| From | Ian Kelly <ian.g.kelly@gmail.com> |
| Date | 2012-01-04 16:09 -0700 |
| Subject | Re: can a subclass method determine if called by superclass? |
| Newsgroups | comp.lang.python |
| Message-ID | <mailman.4433.1325718597.27778.python-list@python.org> (permalink) |
On Wed, Jan 4, 2012 at 3:42 PM, Peter <peter.milliken@gmail.com> wrote: > Situation: I am subclassing a class which has methods that call other > class methods (and without reading the code of the superclass I am > discovering these by trial and error as I build the subclass - this is > probably why I may have approached the problem from the wrong > viewpoint :-)). > > Problem: when overriding one of these "indirectly called" superclass > methods I would like to take differing actions (in the subclass > instance) depending on whether it is the superclass or the subclass > instance performing the call. > > Question: Is there any way to determine in a method whether it is > being called by the superclass or by a method of the subclass > instance? Well, you could get the previous stack level using traceback.extract_stack() and check the filename. But it sounds like what you actually have are two different methods -- one that is used by the superclass, and one that only the subclass knows about and uses. Why not implement it as such?
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can a subclass method determine if called by superclass? Peter <peter.milliken@gmail.com> - 2012-01-04 14:42 -0800
Re: can a subclass method determine if called by superclass? Ian Kelly <ian.g.kelly@gmail.com> - 2012-01-04 16:09 -0700
Re: can a subclass method determine if called by superclass? Peter <peter.milliken@gmail.com> - 2012-01-04 15:37 -0800
Re: can a subclass method determine if called by superclass? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-01-05 02:18 +0000
Re: can a subclass method determine if called by superclass? Jean-Michel Pichavant <jeanmichel@sequans.com> - 2012-01-05 12:09 +0100
Re: can a subclass method determine if called by superclass? Jean-Michel Pichavant <jeanmichel@sequans.com> - 2012-01-05 12:13 +0100
Re: can a subclass method determine if called by superclass? Peter <peter.milliken@gmail.com> - 2012-01-05 10:59 -0800
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