clean-redirects.py

import json

with open('redirects.yaml') as redirects_file:
    redirects = json.load(redirects_file)

new_redirects = {}

for request, target in redirects.iteritems():
    if '?' in request:
        # Remove anything with a question mark (it wont work)
        continue

    if request[-1:] == '/' and request[:-1] in redirects:
        new_request = request[:-1] + '/?'
        new_redirects[new_request] = target
    elif request + '/' not in redirects:
        new_redirects[request] = target

print json.dumps(new_redirects, sort_keys=True, indent=4, separators=(',', ': '))