Convert host.txt to JSON format used by iOS content block list

convertor.py

import sys

Hosts = sys.argv[1]
Rules = './blockerList.json'

in_file = open(Hosts, 'r')
out_file = open(Rules, 'w')

items = []
for line in in_file.readlines():
    strippedLine = line.strip()

    if len(strippedLine) == 0:
        # do nothing on empty lines
        continue
    elif strippedLine.startswith('#'):
        # do nothing on comments
        continue
    else:
        host = strippedLine.split(' ')[1]
        if len(host) > 0:
            item = '    {\n' \
            '         "action": {\n' \
            '             "type": "block"\n' \
            '         },\n' \
            '         "trigger": {\n' \
            '             "url-filter": "' + host + '"\n' \
            '         }\n' \
            '    }'
            items.append(item)

out_file.write('[\n' + ',\n'.join(items)+ '\n]\n')
in_file.close()
out_file.close()