Can a simple a==b 'hang' in and endless loop?

[Steven D'Aprano]

On Thu, 19 Jan 2006 10:08:38 +0100, Claudio Grondi wrote:

> The point is to find a way to create in Python two indentifiers a and b 
> without manipulating any of the __eq__ and to __eq__ related functions 
> in a way, that the simple
>    if a==b: print 'a==b'
> statement results in an endless loop.

Why would you want to?

> To my knowledge this is not possible to achieve in C, but is probably 
> achievable in Python.

I doubt it.

The closest I can think of is something like this:


a = []
a.append(a)
b = []
b.append(b)
a == b

which I'm told used to cause an endless loop in early versions of Python,
but now simply returns True.



-- 
Steven.