[hacker.org] image rgb

import png

reader = png.Reader('didactrgb.png')
w, h, pixels, metadata = reader.read_flat()
for l in pixels:
    print l

print(int(''.join(map(lambda number: hex(number)[2:], [156, 84, 198])), 16))

import png

reader = png.Reader('redline.png')
w, h, pixels, metadata = reader.read_flat()
answer = ''
for l in pixels:
    answer += hex(l)

print answer`

import png

reader = png.Reader('greenline.png')
w, h, pixels, metadata = reader.read_flat()
answer = ''
for l in pixels:
    answer += chr(l)

print answer