Thanks for the inspiration!
This what I did (Using your Python Editor (SPE), I really like to work
with SPE, keep up the good work!!):
#############################################
import Image, os
p = # path to image file
im = Image.open(p)
# check if im has Alpha band...
if im.mode != 'RGBA':
im = im.convert('RGBA')
# create a vertical gradient...
gradient = Image.new('L', (1,255))
for y in range(255):
gradient.putpixel((0,254-y),y)
# resize the gradient to the size of im...
alpha = gradient.resize(im.size)
# put alpha in the alpha band of im...
im.putalpha(alpha)
# Save as png...
im.save(os.path.splitext(p)[0] + '.png', 'PNG
#############################################
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