OT? plpython2u

Hello all.

I need to process images on my database, they are stored on a bytea column.

The process consist on scaling and I have done this so far:

CREATE OR REPLACE FUNCTION ajustar(randstring bytea)
RETURNS bytea AS
$$
import PIL
from PIL import Image
basewidth = 300
img = randstring
wpercent = (basewidth/float(img.size[0]))
hsize = int((float(img.size[1])*float(wpercent)))
img = img.resize((basewidth,hsize), PIL.Image.ANTIALIAS)

return img
$$
LANGUAGE 'plpython2u' VOLATILE;

The objective of this pl is read the bytea from the database, scale, then
replace the scaled image in the database, but I don't know what type use
to pass to the variable img.

This is the query.
update personal set foto=ajustar(encode(foto, 'hex')::bytea);

Thanks in advance.
Nahum

--
*Nahum Castro González*
Blvd. Perdigón 214, Brisas del Lago.
CP 37207
León, Guanajuato, México
Tel (477)1950304
Cel (477)1274694