Calc id_rsa.pub fingerprint

ssh_pubkey_fingerprint.py

import sys
import base64
import hashlib

// Alternative to: >ssh-keygen -E md5 -l -f id_rsa.pub
md5 = hashlib.md5()
md5.update(base64.b64decode(open('id_rsa.pub').read().split()[1]))
digest = md5.digest()
print (":".join("{:02x}".format(c) for c in digest))