Creates a proper /.well-known/browserid from a key.publickey

gen_well_known_browserid.py

#!/usr/bin/env python

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

"""Usage: gen_well_known_browserid.py key.publickey > www/.well-known/browserid

Generates the /.well-known/browserid file based on your public key.

You can run this script on every build or deployment. To "rotate"
your public/private keypair, you generate new keys and run this script
to update the well known file.
"""
import json
import sys
import getopt

def gen_well_known(pubkey):
    rawkey = ''
    with open(pubkey) as pubkey_file:
        rawkey = pubkey_file.read() #.replace('"', 'x')

    print(isinstance(rawkey, str))
    #rawkey = json.load(pubkey)

    temp = json.dumps({
        'public-key': 999,
        'authentication': '/browserid/sign_in.html',
        'provisioning': '/browserid/provision.html'
    }, sort_keys=True, indent=4).split('999')

    print(''.join([temp[0], rawkey, temp[1]]))

def main():
    # parse command line options
    try:
        opts, args = getopt.getopt(sys.argv[1:], "h", ["help"])
    except getopt.error, msg:
        print msg
        print "for help use --help"
        sys.exit(2)

    # process options
    for o, a in opts:
        if o in ("-h", "--help"):
            print __doc__
            sys.exit(0)

    # process arguments
    print('args where')
    if not (len(args) == 1):
        print __doc__
        sys.exit(1)

    gen_well_known(args[0])

if __name__ == "__main__":
    main()

Good idea, added.
https://github.com/mozilla/browserid-certifier/blob/master/scripts/gen_well_known_browserid.py