why () is () and [] is [] work in other way?

[Chris Angelico]

On Fri, Apr 27, 2012 at 12:00 AM, Adam Skutt <askutt at gmail.com> wrote:
> C# and Python do have a misfeature: '==' is identity comparison only
> if operator== / __eq__ is not overloaded.  Identity comparison and
> value comparison are disjoint operations, so it's entirely
> inappropriate to combine them.

So what should happen if you don't implement __eq__? Should the ==
operator throw an exception? This can be done fairly easily:

class object(object):
    def __eq__(self,other):
        raise NoYouDontException("Naughty programmer, mustn't do that!")

(Works only if you always explicitly subclass object, even though
that's not necessary in Python 3.)

ChrisA