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

Steven D'Aprano steve at
Fri Jan 20 18:52:06 EST 2006

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 = []
b = []
a == b

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


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