variable in Python

[Steve Holden]

"Jp Calderone" <exarkun at intarweb.us> wrote in message
news:mailman.1050730020.31828.python-list at python.org...
> On Sat, Apr 19, 2003 at 04:53:55AM +0000, berg_ wrote:
> >
> > > object it refers to; additionally, there is no concept of a "null"
> > > reference.
> >
> > Python does have the concept of null, it is represented by None.
> >
> > cursor = None
> >
>
>   This is merely semantic quibbling, of course - but None is an object.
Is
> it often used like NULL?  Sure, but then, [] and () and '' are also often
> used like NULL (They all have a false truth value, after all).  The
concept
> of a variable that doesn't point to anything, though, doesn't exist in
> Python.  "cursor = None" binds cursor to the immutable singleton object
> "None".
>

Of course, there's always

    del cursor

but even that will fail if the name isn't currently bound.

and-now-back-to-the-angles-on-the-head-of-a-pin-debate-ly y'rs  - steve
--
Steve Holden                                  http://www.holdenweb.com/
Python Web Programming                 http://pydish.holdenweb.com/pwp/