variable in Python

[Jp Calderone]

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".

  Jp

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