On Apr 25, 1:44 am, "Ciprian Dorin, Craciun" <ciprian.crac...@gmail.com> wrote: > On Sat, Apr 25, 2009 at 11:30 AM, "Martin v. Löwis" <mar...@v.loewis.de> > wrote: > > >>>> Ok... Then what's pythonic? Please give a pythonic implementation... > >>> Use the builtin a==b, similar to (equal a b) > > >> But how about extensibility? > > [...] > > > I see that you allow for a different comparison function. I do wonder > > what the use case for this is - in what application do you have to > > compare two lists for equality, and the item's __eq__ is inappropriate? > > What would break if you fix the item's __eq__, instead of writing > > your own comparison algorithm? > > > [...] > > A practical example: I have lists that contain strings, but I want > to compare them in an case-insensitive way... Should I update the > __eq__ method (for str class) and break almost everything?
The practical way to deal with this issue is to write your own function when you encounter a situation where == doesn't suffice. Carl Banks -- http://mail.python.org/mailman/listinfo/python-list
