Overloading operators for currying, a PEP309 suggestion

[Jp Calderone]

On Tue, Mar 11, 2003 at 03:38:41PM +0100, Bernhard Herzog wrote:
> Stephen Horne <intentionally at blank.co.uk> writes:
> 
> > I would prefer defining the __len__, __getitem__, __setitem__ and
> > __delitem__ methods to allow direct manipulation (and creation and
> > deletion) of the closure.
> 
> That would mean that the length of a function with no arguments is 0,
> right? That's bad and will likely introduce subtle bugs because then all
> functions with no arguments are suddenly considered false.
> 

    >>> class foo(object):
    ...   def __len__(self): return 0
    ...   def __nonzero__(self): return 1
    ... 
    >>> if foo(): print 'evaluates to true'
    evaluates to true


  Jp

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