object query assigned variable name?

[John O'Hagan]

On Sat, 2 May 2009, John O'Hagan wrote:
> On Fri, 1 May 2009, warpcat wrote:

[...]

> > Given an object:
> >
> > class Spam(object):
> >     def __init__(self):
> >         # stuff....
> >
> > I'd like it to print, when instanced, something like this:
> > >>> s = Spam()
> >
> > I’m assigned to s!
>
> If you just want the names an instance has in a given namespace, you could
> give your class a method like:
>
> class KnowNames(object):
>     def get_names(self, namespace):
>         id_str = str(hex(id(self))[:-1])
>         return [i for i in namespace if id_str in str(namespace[i])]
>
> which will give you a list of names when called on an instance.

And which is a silly way of saying:

class KnowName(object):
    def get_names(self, namespace):
        return [i for i in namespace if namespace[i] is self]

removing four function calls, an assignment and a slicing operation from a 
mere two lines; certainly a personal best for insanely over-wrought code!

Oops. :) ,

John