[Python-3000] PEP 368: Standard image protocol and class

[Edin Salkovic]

Hi Lino,

On 7/1/07, Lino Mastrodomenico <l.mastrodomenico at gmail.com> wrote:
> ``__getitem__(integer) -> line``
>
>     Returns the line at the specified (y) position.

Just some ideas to think about.

1) Have you considered adding a separate lines property to the Image protocol?

2) Does one, by default, want to iterate over lines or over pixels of
an image?  Even your example iterates  over pixels:

   # iterate over an image
   for line in rgb_image:
       for pixel in line:
           # swap red and blue, and set green to 0
           pixel.value = pixel.b, 0, pixel.r

why not just:
   # iterate over an image
   for pixel in rgb_image:
           pixel.value = pixel.b, 0, pixel.r

3) The pixels method (same for the possible lines property that I
mentioned above) should probably be a property, i.e.:
pixels -> iterator[pixel], not: pixels() -> iterator[pixel]

P.S.: You might also inform the SciPy/NumPy lists about the PEP.

Keep up the good work!,
Edin