hibp.py

#!/usr/bin/env python3

import requests
import hashlib
import getpass

password = getpass.getpass()
hash = hashlib.sha1(password.encode("utf8")).hexdigest().upper()
head, rest = hash[:5], hash[5:]
r = requests.get("https://api.pwnedpasswords.com/range/%s" % head)
if rest in r.content.decode("utf8"):
    print("Password breached.")
else:
    print("You're good... For now.")