----- Original Message ----- From: "Aurélien Campeas" <aurelien.camp...@logilab.fr> To: "Rob Cliffe" <rob.cli...@btinternet.com> Sent: Wednesday, April 21, 2010 5:25 PM Subject: Re: [Python-Dev] Small suggestion re help(Exception)
> like in > >>>> ArithmeticError.__subclasses__() > [<type 'exceptions.FloatingPointError'>, <type > 'exceptions.OverflowError'>, <type 'exceptions.ZeroDivisionError'>] > > ? Yes, exactly like that. I wasn't aware of __subclasses__ (it doesn't appear in dir(ArithmeticError), for example), but if my suggestion were adopted, __subclasses__ would be just what is needed to implement it. Rob Cliffe > > Le mercredi 21 avril 2010 à 17:17 +0100, Rob Cliffe a écrit : >> help() on an Exception class lists the method resolution order >> (effectively the inheritance hierarchy). >> E.g. help(ArithmeticError) displays inter alia: >> >> Method resolution order: >> ArithmeticError >> StandardError >> Exception >> BaseException >> __builtin__.object >> >> Would it be possible for it also display the Python built-in >> SUBclasses of the class? E.g. in the same example something like: >> >> Built-in subclasses: >> FloatingPointError >> OverflowError >> ZeroDivisionError >> >> This may seem pointless to grizzled old Python veterans who (maybe) >> know the inheritance hierarchy backwards, but for those of us with >> less experience I think it would be helpful, e.g. >> (1) It would help to track down an Exception whose name you have >> forgotten. >> (2) It would sometimes be illuminating, e.g. LookupError might be a >> bit obscure at first, until you see that it is the superclass of the >> familiar IndexError and KeyError. >> >> Sorry, I'm not sure if I should send this sort of thing to >> Python-Ideas or Python-Dev, so please let me know gently which one I >> should (not) have sent it to. >> >> Best wishes >> Rob Cliffe >> _______________________________________________ >> Python-Dev mailing list >> Python-Dev@python.org >> http://mail.python.org/mailman/listinfo/python-dev >> Unsubscribe: >> http://mail.python.org/mailman/options/python-dev/aurelien.campeas%40logilab.fr > >
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