[TriPython] Massaging list

[Rex Dwyer]

#1.  It’s rare to need to explicitly copy a list. Are you transforming each
element of the list? Consider using map(f,lis).

On Wed, Aug 11, 2021 at 12:00 PM <trizpug-request at python.org> wrote:

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>    1. Editing a list in a function (Mauricio Tavares)
>
>
>
> ---------- Forwarded message ----------
> From: Mauricio Tavares <raubvogel at gmail.com>
> To: "Triangle (North Carolina) Python Users Group (formerly TriZPUG)" <
> TriZPUG at python.org>
> Cc:
> Bcc:
> Date: Wed, 11 Aug 2021 10:38:11 -0400
> Subject: [TriPython] Editing a list in a function
> Thought process question: I have a list I want to massage a list
>
> def massage_list(thelist):
>     # Do things
>
> inputlist = [...]
>
> If I want to preserve the original list, would it be more logical if
>
> 1. massage_list() returns new list. If you want the output to be
> applied to inputlist, you have to do something like
>
> inputlist = massage_list(inputlist)
>
> 2. You create a new list which is a deepcopy() of inputlist, and then
> feed it to massage_list()
>
> I am leaning towards #1 (function creates things which are returned)
> but if #2 makes more sense, do let me know before I go too far.
>
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-- 
Rex A. Dwyer
-------------- next part --------------
   #1.** It***s rare to need to explicitly copy a list. Are you transforming
   each element of the list? Consider using map(f,lis).
   On Wed, Aug 11, 2021 at 12:00 PM <[1]trizpug-request at python.org> wrote:

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     Today's Topics:

     ** **1. Editing a list in a function (Mauricio Tavares)

     ---------- Forwarded message ----------
     From:**Mauricio Tavares <[6]raubvogel at gmail.com>
     To:**"Triangle (North Carolina) Python Users Group (formerly TriZPUG)"
     <[7]TriZPUG at python.org>
     Cc:**
     Bcc:**
     Date:**Wed, 11 Aug 2021 10:38:11 -0400
     Subject:**[TriPython] Editing a list in a function
     Thought process question: I have a list I want to massage a list

     def massage_list(thelist):
     ** ** # Do things

     inputlist = [...]

     If I want to preserve the original list, would it be more logical if

     1. massage_list() returns new list. If you want the output to be
     applied to inputlist, you have to do something like

     inputlist = massage_list(inputlist)

     2. You create a new list which is a deepcopy() of inputlist, and then
     feed it to massage_list()

     I am leaning towards #1 (function creates things which are returned)
     but if #2 makes more sense, do let me know before I go too far.

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   --
   Rex A. Dwyer

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