Example program that retrieves a remote JSON file/URL, and outputs the JSON response to the console.

#!/usr/bin/python

from __future__ import print_function

import os
import sys
import json
from urllib import urlopen
import argparse


def usage(prog):
    print('')
    print('Gets a JSON URL.')
    print('Download the json file from the url and returns a decoded object.')
    print('')
    print('Usage:')
    print('')
    print('   %s <url>' % prog)
    print('')


def get_json(json_url):
    f = urlopen(json_url)
    data = f.read().decode('utf-8')
    f.close()
    return json.loads(data)


if __name__ == '__main__':
    progname = os.path.basename(str(sys.argv[0]))
    args = sys.argv[1:]
    if not args or len(args) < 1:
        usage(progname)
        sys.exit(2)
    arg = sys.argv[1]
    status = 0
    for url in args:
        if not url:
            status = 1
            print(progname + ':', url + ':', 'empty url')
        else:
            print(str(get_json(url)))
    sys.exit(status)