On Tue, Apr 22, 2014 at 12:06 AM, Skip Montanaro <s...@pobox.com> wrote: > Without examining the source, is > it possible to define some kind of "selective" dir, with a API like > > def selective_dir(inst, class_): pass > > which will list only those attributes of inst which were first defined > in (some method defined by) class_? The output of calls with different > class_ args would yield different lists: > > selective_dir(inst_b, B) -> ['y'] > > selective_dir(inst_b, A) -> ['x'] > > I'm thinking some sort of gymnastics with inspect might do the trick, > but after a quick skim of that module's functions nothing leapt out at > me.
Hmm. Interesting. Fundamentally, attributes in Python don't give you anything about which class they were defined in... by default. However, it ought to be possible to play around with the metaclass; it could detect that you're creating a new attribute and record that somewhere. But if you know that all the attributes you care about are set in __init__, you could do some analysis on that, as you were looking at. Might turn out to be a lot of work to dig through the compiled code, though. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
