tuple.index(item)
Why don't tuples support an index method? It seems natural enough ... Thanks, Alan Isaac -- http://mail.python.org/mailman/listinfo/python-list
Re: tuple.index(item)
On Monday 11 July 2005 15:23, David Isaac [EMAIL PROTECTED]
([EMAIL PROTECTED]) wrote:
Why don't tuples support an index method?
19:27:32:~ $ python
Python 2.3.5 (#2, Jun 19 2005, 13:28:00)
[GCC 3.3.6 (Debian 1:3.3.6-6)] on linux2
Type help, copyright, credits or license for more information.
t = ('a', 'b', 'c')
t[1]
'b'
It seems natural enough ...
It does to me, too.
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Re: tuple.index(item)
Jules Dubois wrote:
On Monday 11 July 2005 15:23, David Isaac [EMAIL PROTECTED]
([EMAIL PROTECTED]) wrote:
Why don't tuples support an index method?
19:27:32:~ $ python
Python 2.3.5 (#2, Jun 19 2005, 13:28:00)
[GCC 3.3.6 (Debian 1:3.3.6-6)] on linux2
Type help, copyright, credits or license for more information.
t = ('a', 'b', 'c')
t[1]
'b'
He means, rather
t.index('b') == 1
as it works for lists.
--
Robert Kern
[EMAIL PROTECTED]
In the fields of hell where the grass grows high
Are the graves of dreams allowed to die.
-- Richard Harter
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Re: tuple.index(item)
David Isaac wrote: Why don't tuples support an index method? It seems natural enough ... This question has been posed several (many?) times in the past. See the archives for more detail, but basically the answer that is usually given is this: Tuples are intended to be used somewhat like C structs, or Pascal records, which is to say they should contain heterogeneous sequences of information for which the concept of .index() is fairly meaningless. They are _not_ generally intended to be used as read-only lists, and that's basically why .index() wasn't defined for them. Another answer that probably follows close on the heels of that one is along the lines of patches are always welcome, but I honestly don't know if a patch to add this would be accepted. Probably checking Sourceforge for past patches would give an answer, since it seems likely someone has already tried. -Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: tuple.index(item)
[David Isaac] Why don't tuples support an index method? It seems natural enough ... [Peter Hansen] This question has been posed several (many?) times in the past. See the archives for more detail, but basically the answer that is usually given is this: Tuples are intended to be used somewhat like C structs, or Pascal records, which is to say they should contain heterogeneous sequences of information for which the concept of .index() is fairly meaningless. They are _not_ generally intended to be used as read-only lists, and that's basically why .index() wasn't defined for them. Another answer that probably follows close on the heels of that one is along the lines of patches are always welcome, but I honestly don't know if a patch to add this would be accepted. Probably checking Sourceforge for past patches would give an answer, since it seems likely someone has already tried. Executive summary: Guido likes it the way it is. Someday, he may change his mind. Probably not. Raymond Hettinger -- http://mail.python.org/mailman/listinfo/python-list
