Python Challenge - Level 28

Problem

RING-RING-RING say it out loud

Solution

http://www.pythonchallenge.com/pc/ring/green.html

yes! green!

from PIL import Image

im = Image.open('bell.png')

# split RGB and get Green
green = list(im.split()[1].getdata())

# calculate diff for every two bytes
diff = [abs(a - b) for a, b in zip(green[0::2], green[1::2])]

# remove the most frequent value 42
filtered = list(filter(lambda x: x != 42, diff))

# convert to string and print out
print(bytes(filtered).decode())

Result

whodunnit().split()[0] ?

The creator of Python is Guido van Rossum, so the final answer is "guido"

Next Level

http://www.pythonchallenge.com/pc/ring/guido.html

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