Should Python raise a warning for mutable default arguments?

[castironpi]

On Aug 23, 2:57 pm, Cousin Stanley <cousinstan... at gmail.com> wrote:
> > Question: what is real warning?
>
>   Don't  MAKE ME  have to tell you  AGAIN !!!!
>
> --
> Stanley C. Kitching
> Human Being
> Phoenix, Arizona

Two black eyes.  Haa haa.  My question comes from: "less likely to
notice if a real warning is printed."  And this one is a real one, is
my point.