short and simple, but basically tells you if rainbow tables can crack your password

somewhere_over_the_rainbow.py

import hashlib
import requests


def search_hexdigest(hexdigest):
    url = f"https://www.google.ca/search?q={hexdigest}"
    html = requests.get(url, headers={
            "User-Agent": "Mozilla/5.0 (X11; Linux i586; rv:34.0) "
                          "Gecko/20100101 Firefox/31.0"
        }).text
    not_found = f"Your search - <em>{hexdigest}</em> - did not match any " \
                f"documents"
    if not_found in html:
        return False
    return True


def is_leaked(password, libs=None):
    libs = libs or ("md5", "sha1", "sha256")
    for lib in libs:
        print("searching", lib, "password hash:", password)
        digest = getattr(hashlib, lib)(password.encode("utf-8"))
        if search_hexdigest(digest.hexdigest()):
            print(lib, "is all over the web!!!")
            return True
    return False


print(is_leaked("password1!"))