[Tutor] For Loop question

Kent Johnson kent37 at tds.net
Fri Jun 27 13:22:22 CEST 2008

On Fri, Jun 27, 2008 at 2:45 AM, Mark Tolonen <metolone+gmane at gmail.com> wrote:

> The above solutions create new lists.  If a functional requirement is to
> modify the list in place, then the original is fine (on Python 2.6 and
> later) or should use xrange instead of range (on Python 2.5 or earlier,
> especially for large lists).

range() has not changed it Python 2.6, it still returns a list. 2.6
makes only backwards-compatible changes.

The Python 2.6 docs say, "The advantage of xrange() over range() is
minimal (since xrange() still has to create the values when asked for
them) except when a very large range is used on a memory-starved
machine or when all of the range's elements are never used (such as
when the loop is usually terminated with break)."


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