[Python-ideas] OrderedCounter and OrderedDefaultDict

[Chris Angelico]

On Wed, Oct 21, 2015 at 5:14 AM, Sven R. Kunze <srkunze at mail.de> wrote:
> Not saying that inheritance is a bad thing but to me It seems to me that
> ordering and default values should be orthogonal aspects of the standard
> dict.
>
> Just as Sandi described it here: https://www.youtube.com/watch?v=29MAL8pJImQ

Yeah... that video is absolutely correct... for Ruby. In Python, you
can use multiple inheritance to do that in the exactly obvious way.

class EchoRandomHouse(EchoHouse, RandomHouse): pass

When I got to the bit in that video where she says that inheritance
paints you into a corner, I went and reimplemented her example code in
Python, and it's flawless. It doesn't even matter which order you put
the two superclasses, as there's no conflict.

ChrisA