OO-programming question

[Rainer Deyke]

"Alex Martelli" <aleaxit at yahoo.com> wrote in message
news:8ou9i4029q1 at news2.newsguy.com...
> def allbases(aclass, baselist=[]):
>     baselist.append(aclass)
>     bases=aclass.__bases__
>     for base in bases:
>         allbases(base, baselist)
>     return baselist
>
> def allclasses(aninstance):
>     return allbases(aninstance.__class__)

This will break the second time allclasses is called.  Don't use mutable
default args unless you really know what you're doing.


--
Rainer Deyke (root at rainerdeyke.com)
Shareware computer games           -           http://rainerdeyke.com
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