def run_post():
	url = 'http://httpbin.org/post'
	data = {'a': 10, 'b': [{'c': True, 'd': False}, None]}
	headers = {'Content-Type': 'application/json'}

	r = requests.post(url, data=json.dumps(data), headers=headers)

	return json.dumps(r.json(), indent=4)