Why Python does *SLICING* the way it does??

[Antoon Pardon]

Op 2005-04-21, Raymond Hettinger schreef <vze4rx4y at verizon.net>:
>> > [Antoon Pardon]
>> >> I don't see why the start index can't be accessible through
>> >> a method or function just like the length of a list is now.
>> >>
>> >> My favourite would be a range method so we would have
>> >> the following idiom:
>> >>
>> >>   for i in lst.range():
>> >>     do something with lst[i]
>> >
>> > After going to all that trouble, you might as well also get the value at
> that
>> > position:
>> >
>> > for i, x in enumerate(lst):
>> >     do something with lst[i] also known as x
>>
>> No you wouldn't, enumerate always starts with 0.
>
> You don't get it.  Your proposed list-like class indicates its start index.
> enumerate() can be made to detect that start value so that the above code always
> works for both 0-based and 1-based arrays.

Oh you mean if it would be made a buildin class.

Personnally I would still prefer my range solution. I often find
enumerate gives me too much. Often enough I want to assign new values
to the elements in the list. I have no need for the old value, that
is also provided by enumerate.

-- 
Antoon Pardon