# Code from <http://stackoverflow.com/a/6682934/1535629>
import base64, hashlib
 
# paste your key on line 6
key = """
ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCGLAOLEI/vxdNsPwcKIIi5sKmJNjZsOC4L
zCtb9lU8TrrucjP8b7c6fK+yMma2fPaA1EcUTy+e/OX8pV+/GqfmUbo5SVWZwsWb
pqTHQqEXIX6xs111wOd0chYvS6aoLVU86LExKKGmAIhbdhudjkcztmUPAw0L6ed7
9Tn3hiBkB+HE/eycGNuWJnUQ6PPFb6e9vN5botnU119ejeAU8mbN7swjBKSLGBUo
KmSA436gVqHB4Pc94GVSuVP5L0bz24Yk4C5Y4WtYM894CNaVZmAv/wdc1bG6n39Q
/31zrw5kLWIk0NjplwdaKr4CA8mkhH7lPcVrtTdttS2YSUy9kr+r
 
"""
 
def lineToFingerprint(line):
    key = base64.b64decode(line.strip().split()[1].encode('ascii'))
    fp_plain = hashlib.md5(key).hexdigest()
    return ':'.join(a+b for a,b in zip(fp_plain[::2], fp_plain[1::2]))
 
print(lineToFingerprint(key))

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