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Groups > comp.lang.python > #79346
| From | Denis McMahon <denismfmcmahon@gmail.com> |
|---|---|
| Newsgroups | comp.lang.python |
| Subject | Re: Building lists |
| Date | 2014-10-20 22:40 +0000 |
| Organization | A noiseless patient Spider |
| Message-ID | <m2431i$mdn$3@dont-email.me> (permalink) |
| References | <obja4a5ij57rtuaivtvcuqsufhuhk3a2su@4ax.com> <mailman.15001.1413834029.18130.python-list@python.org> <6jpa4ahhc8ln7hk8s0258hvqd3io51epa0@4ax.com> |
On Mon, 20 Oct 2014 15:49:15 -0400, Seymore4Head wrote:
> For starters I would like to know if you can make a single item list and
> then turn it into a 2 item list. Is there a command for that?
Yes, it's called assignment. You can for example change a member of a
list from an string to a tuple such as ( string, number ):
>>> x = [ "fred", "jim", "susan" ]
>>> x[x.index("jim")] = ( "jim", 11, )
>>> print x
['fred', ('jim', 11), 'susan']
> Do you have to know the number of items the list will have before making
> it?
No. See the append() method of the list object.
--
Denis McMahon, denismfmcmahon@gmail.com
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Building lists Seymore4Head <Seymore4Head@Hotmail.invalid> - 2014-10-20 14:10 -0400
Re: Building lists sohcahtoa82@gmail.com - 2014-10-20 11:18 -0700
Re: Building lists Seymore4Head <Seymore4Head@Hotmail.invalid> - 2014-10-20 14:21 -0400
Re: Building lists sohcahtoa82@gmail.com - 2014-10-20 11:33 -0700
Re: Building lists Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-10-20 20:55 +0100
Re: Building lists MRAB <python@mrabarnett.plus.com> - 2014-10-20 20:40 +0100
Re: Building lists Seymore4Head <Seymore4Head@Hotmail.invalid> - 2014-10-20 15:49 -0400
Re: Building lists Ian Kelly <ian.g.kelly@gmail.com> - 2014-10-20 13:58 -0600
Re: Building lists Seymore4Head <Seymore4Head@Hotmail.invalid> - 2014-10-20 16:23 -0400
Re: Building lists Ian Kelly <ian.g.kelly@gmail.com> - 2014-10-20 14:45 -0600
Re: Building lists Seymore4Head <Seymore4Head@Hotmail.invalid> - 2014-10-20 16:55 -0400
Re: Building lists Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-10-20 21:47 +0100
Re: Building lists Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-10-20 20:57 +0100
Re: Building lists Seymore4Head <Seymore4Head@Hotmail.invalid> - 2014-10-20 16:24 -0400
Re: Building lists Denis McMahon <denismfmcmahon@gmail.com> - 2014-10-20 22:40 +0000
Re: Building lists Seymore4Head <Seymore4Head@Hotmail.invalid> - 2014-10-20 18:44 -0400
Re: Building lists Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-10-21 10:55 +1100
Re: Building lists Seymore4Head <Seymore4Head@Hotmail.invalid> - 2014-10-20 20:05 -0400
Re: Building lists Larry Hudson <orgnut@yahoo.com> - 2014-10-21 00:11 -0700
Re: Building lists Seymore4Head <Seymore4Head@Hotmail.invalid> - 2014-10-21 08:54 -0400
Re: Building lists Larry Hudson <orgnut@yahoo.com> - 2014-10-21 00:40 -0700
Re: Building lists Seymore4Head <Seymore4Head@Hotmail.invalid> - 2014-10-21 08:55 -0400
Re: Building lists Denis McMahon <denismfmcmahon@gmail.com> - 2014-10-20 22:30 +0000
Re: Building lists MRAB <python@mrabarnett.plus.com> - 2014-10-20 23:57 +0100
Re: Building lists John Gordon <gordon@panix.com> - 2014-10-20 20:48 +0000
Re: Building lists Seymore4Head <Seymore4Head@Hotmail.invalid> - 2014-10-20 17:25 -0400
Re: Building lists Ian Kelly <ian.g.kelly@gmail.com> - 2014-10-20 15:34 -0600
Re: Building lists Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2014-10-20 21:31 -0400
Re: Building lists Seymore4Head <Seymore4Head@Hotmail.invalid> - 2014-10-21 08:55 -0400
Re: Building lists Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2014-10-21 10:54 +1300
Re: Building lists Seymore4Head <Seymore4Head@Hotmail.invalid> - 2014-10-20 17:57 -0400
Re: Building lists Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2014-10-20 21:27 -0400
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