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Possible PEP - two dimensional arrays?

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  Possible PEP - two dimensional arrays? Harrison Chudleigh <harrison.chudleigh1@education.nsw.gov.au> - 2016-06-08 10:17 +1000
    Re: Possible PEP - two dimensional arrays? Paul Rubin <no.email@nospam.invalid> - 2016-06-07 17:28 -0700
    Re: Possible PEP - two dimensional arrays? Ned Batchelder <ned@nedbatchelder.com> - 2016-06-07 17:38 -0700
    Re: Possible PEP - two dimensional arrays? Rob Gaddi <rgaddi@highlandtechnology.invalid> - 2016-06-08 00:45 +0000

#109641 — Possible PEP - two dimensional arrays?

I was programming a computer game and found that while 1D arrays can be
created using the module array, there is no module for two-dimensional
arrays, unlike languages like C. Currently, the closest thing Python has to
a 2D array is a dictionary containing lists.

I propose that a module , 2DArray, be added to the standard library. This
module will include:
Assignment and retrieval on items on a two-dimensional, finite rectangular
grid. Types are integer, float, character and string.
Resizing the grid - parameters are old size and new size. Any new elements
are initialized with a value of 0 for int, 0.0 for float and ' ' for string
and character arrays.
Removing elements. The parameter is the location. After removal, the value
returned is 0 for int, 0.0 for float and ' ' for string and character
arrays.
A function, pop(), which removes elements from the grid and then returns
them.

Is this idea PEPable?
*******************************************************************************
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#109642

Harrison Chudleigh <harrison.chudleigh1@education.nsw.gov.au> writes:
> Currently, the closest thing Python has to a 2D array is a dictionary
> containing lists.

Tuples work fine:
  d = {}
  d[2,3] = 5  # etc...

> Is this idea PEPable?

I don't think it would get any traction.  If you're doing something
numerical that needs 2d arrays, numpy supports them.  Actually, looking
at your application, numpy might be what you want.

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#109644

On Tuesday, June 7, 2016 at 8:19:33 PM UTC-4, Harrison Chudleigh wrote:
> I was programming a computer game and found that while 1D arrays can be
> created using the module array, there is no module for two-dimensional
> arrays, unlike languages like C. Currently, the closest thing Python has to
> a 2D array is a dictionary containing lists.
> 
> I propose that a module , 2DArray, be added to the standard library. This
> module will include:
> Assignment and retrieval on items on a two-dimensional, finite rectangular
> grid. Types are integer, float, character and string.
> Resizing the grid - parameters are old size and new size. Any new elements
> are initialized with a value of 0 for int, 0.0 for float and ' ' for string
> and character arrays.
> Removing elements. The parameter is the location. After removal, the value
> returned is 0 for int, 0.0 for float and ' ' for string and character
> arrays.
> A function, pop(), which removes elements from the grid and then returns
> them.
> 
> Is this idea PEPable?

People who need arrays like this generally use numpy, which has good support
for N-dimensional arrays and all of the operations you'd like on them.

I don't think Python would consider adding something like this to the 
standard library since numpy is available.

--Ned.

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#109645

Harrison Chudleigh wrote:

> I was programming a computer game and found that while 1D arrays can be
> created using the module array, there is no module for two-dimensional
> arrays, unlike languages like C. Currently, the closest thing Python has to
> a 2D array is a dictionary containing lists.
>
> I propose that a module , 2DArray, be added to the standard library. This
> module will include:
> Assignment and retrieval on items on a two-dimensional, finite rectangular
> grid. Types are integer, float, character and string.
> Resizing the grid - parameters are old size and new size. Any new elements
> are initialized with a value of 0 for int, 0.0 for float and ' ' for string
> and character arrays.
> Removing elements. The parameter is the location. After removal, the value
> returned is 0 for int, 0.0 for float and ' ' for string and character
> arrays.
> A function, pop(), which removes elements from the grid and then returns
> them.
>
> Is this idea PEPable?
> *******************************************************************************
> This message is intended for the addressee named and may contain privileged information or confidential information or both. If you are not the intended recipient please delete it and notify the sender.

You're looking for numpy.

-- 
Rob Gaddi, Highland Technology -- www.highlandtechnology.com

Email address domain is currently out of order.  See above to fix.

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