How to access the low digits of a list

[Mark Lawrence]

On 03/06/2015 22:08, Rustom Mody wrote:
> On Tuesday, June 2, 2015 at 7:50:58 PM UTC+5:30, Ian wrote:
>> On Tue, Jun 2, 2015 at 6:35 AM, Rustom Mody  wrote:
>>> For that matter even this works
>>> But I am not sure whats happening or that I like it
>>>
>>>>>> [x[-2:]  for x in lines]
>>> ['12', '42', '49', '56', '25', '36', '49', '64', '81', '00']
>>
>> x[-2:] selects all items in the sequence with index i such that len(x)
>> - 2 <= i < len(x). For a sequence of length 2 or less, that's the
>> entire sequence.
>
> Thanks -- learn something
> So it means that indices can give indexerror; slices cannot?
> Seems fair enough put that way, but is visually counterintuitive
>

Are you seriously trying to say that you teach Python but don't 
understand a basic that is here 
https://docs.python.org/3/tutorial/introduction.html, "Slice indices 
have useful defaults; an omitted first index defaults to zero, an 
omitted second index defaults to the size of the string being sliced."?

-- 
My fellow Pythonistas, ask not what our language can do for you, ask
what you can do for our language.

Mark Lawrence