Presents enabled filters in an understandable way (expects a bunch of *.list files in its directory as input)

default-filters.py

#!/usr/bin/env python

import glob
import operator
import os


clouds = []
for l in glob.glob('*.list'):
    with open(l) as f:
        clouds.append(set([line.rstrip() for line in f.readlines()]))

common_filters = set.intersection(*clouds)
print('Filters common to all deployments: %s\n' % common_filters)

all_filters = set.union(*clouds)
filter_count = {}
for filter in all_filters:
    for cloud in clouds:
        if filter in cloud:
            if filter not in filter_count:
                filter_count[filter] = 1
            else:
                filter_count[filter] = filter_count[filter] + 1

print('Filter counts (out of %d deployments):' % len(clouds))
sorted_count = sorted(filter_count.items(), key=operator.itemgetter(1),
                      reverse=True)
for filter in sorted_count:
    print('{0:40} {1}'.format(filter[0], filter[1]))