"""
https://stackoverflow.com/a/9746432/496445
"""
import json
import urllib.request

data = {
    'ids': [12, 3, 4, 5, 6]
}

req = urllib.request.Request('http://example.com/api/posts/create')
req.add_header('Content-Type', 'application/json')

response = urllib.request.urlopen(req, json.dumps(data).encode('utf8'))