At long last...

Carl Banks pavlovevidence at gmail.com
Fri Jun 20 04:24:46 CEST 2008


On Jun 19, 10:17 pm, Terry Reedy <tjre... at udel.edu> wrote:
> Carl Banks wrote:
> > Tuples will have an index method in Python 2.6.
>
> > I promise I won't indiscriminately use tuples for homogenous data.
> > Honest.  Scout's honor.  Cross my heart.
>
> Use them as you want.  This change came about because .index was
> included in the 3.0 Sequence ABC (abstract base class) and tuple was
> included as a sequence, so .... something had to give.  The result was
> tuple getting the full suite of immutable sequence methods.  And then
> there was no good reason to not backport ;-).

The last time I needed index on a tuple was in fact for partially non-
homogenous data.  I forget why, but I needed to treat arguments after
a certain value different from the front arguments.  So I wanted to do
something like:

def something(*args):
    firstspecial = args.index(0)

'Cept I couldn't.


Carl Banks



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