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Groups > comp.lang.python > #26860
| Date | 2012-08-10 06:53 -0400 |
|---|---|
| From | Dave Angel <d@davea.name> |
| Subject | Re: [newbie] A question about lists and strings |
| References | <k02jn0$id2$1@news.albasani.net> <mailman.3150.1344593295.4697.python-list@python.org> <k02nt5$r8p$1@news.albasani.net> |
| Newsgroups | comp.lang.python |
| Message-ID | <mailman.3154.1344596023.4697.python-list@python.org> (permalink) |
On 08/10/2012 06:31 AM, Mok-Kong Shen wrote:
> Am 10.08.2012 12:07, schrieb Dave Angel:
> [snip]
>> At this point, in top-level code, the listb object has been modified,
>> and the strb one has not; it still is bound to the old value.
>
> This means there is no way of modifying a string at the top level
> via a function, excepting through returning a new value and assigning
> that to the string name at the top level. Please again correct me, if
> I am wrong.
>
> M. K. Shen
>
You're close. There are three ways I can think of. The "right" way is
to return a value, which the caller can use any way he wants, including
binding it to a global.
Second is to declare the name as global, rather than taking the object
as a formal parameter. In this case, you're taking on the
responsibility for managing that particular global, by its correct name.
def yy():
global strb
strb += "whatever"
Third is to hold the string in some more complex structure which is
mutable. (untested, may contain typos)
def zz(mydict):
mydict["key1"] += "text"
called as:
globaldict = {"key1": "initial ", "key2": "init"}
--
DaveA
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[newbie] A question about lists and strings Mok-Kong Shen <mok-kong.shen@t-online.de> - 2012-08-10 11:19 +0200
Re: [newbie] A question about lists and strings Roman Vashkevich <vashkevichrb@gmail.com> - 2012-08-10 13:28 +0400
Re: [newbie] A question about lists and strings Roman Vashkevich <vashkevichrb@gmail.com> - 2012-08-10 13:48 +0400
Re: [newbie] A question about lists and strings Mok-Kong Shen <mok-kong.shen@t-online.de> - 2012-08-10 12:12 +0200
Re: [newbie] A question about lists and strings Chris Angelico <rosuav@gmail.com> - 2012-08-10 20:37 +1000
Re: [newbie] A question about lists and strings Dave Angel <d@davea.name> - 2012-08-10 06:37 -0400
Re: [newbie] A question about lists and strings Roman Vashkevich <vashkevichrb@gmail.com> - 2012-08-10 14:56 +0400
Re: [newbie] A question about lists and strings Mok-Kong Shen <mok-kong.shen@t-online.de> - 2012-08-10 13:08 +0200
Re: [newbie] A question about lists and strings Dave Angel <d@davea.name> - 2012-08-10 06:56 -0400
Re: [newbie] A question about lists and strings Chris Angelico <rosuav@gmail.com> - 2012-08-10 21:00 +1000
Re: [newbie] A question about lists and strings Roman Vashkevich <vashkevichrb@gmail.com> - 2012-08-10 15:06 +0400
Re: [newbie] A question about lists and strings Peter Otten <__peter__@web.de> - 2012-08-10 11:59 +0200
Re: [newbie] A question about lists and strings Rotwang <sg552@hotmail.co.uk> - 2012-08-10 16:12 +0100
Re: [newbie] A question about lists and strings Dave Angel <d@davea.name> - 2012-08-10 06:07 -0400
Re: [newbie] A question about lists and strings Mok-Kong Shen <mok-kong.shen@t-online.de> - 2012-08-10 12:31 +0200
Re: [newbie] A question about lists and strings Chris Angelico <rosuav@gmail.com> - 2012-08-10 20:40 +1000
Re: [newbie] A question about lists and strings Mok-Kong Shen <mok-kong.shen@t-online.de> - 2012-08-10 12:48 +0200
Re: [newbie] A question about lists and strings Dave Angel <d@davea.name> - 2012-08-10 06:58 -0400
Re: [newbie] A question about lists and strings Dave Angel <d@davea.name> - 2012-08-10 06:53 -0400
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