Unpaking Tuple

[Thomas Bach]

Hi there,

On Sat, Oct 06, 2012 at 03:08:38PM +0000, Steven D'Aprano wrote:
> 
> my_tuple = my_tuple[:4]
> a,b,c,d = my_tuple if len(my_tuple) == 4 else (my_tuple + (None,)*4)[:4]
> 

Are you sure this works as you expect? I just stumbled over the following:

$ python
Python 3.2.3 (default, Jun 25 2012, 23:10:56) 
[GCC 4.7.1] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> split = ['foo', 'bar']
>>> head, tail = split if len(split) == 2 else split[0], None
>>> head
['foo', 'bar']
>>> tail
>>> 

I don't get it! Could someone help me, please? Why is head not 'foo'
and tail not 'bar'?

Regards,
	Thomas