Python 3.4 Urllib Basic Auth: the script sends JSON data via POST request using HTTP Basic authentication and urllib.

Python_Urllib_Basic_Auth_Query.py

import urllib.request
import urllib.response

userName = "user"
passWord  = "password"
top_level_url = "http://127.0.0.1/api/update"

# create an authorization handler
p = urllib.request.HTTPPasswordMgrWithDefaultRealm()
p.add_password(None, top_level_url, userName, passWord);

auth_handler = urllib.request.HTTPBasicAuthHandler(p)
opener = urllib.request.build_opener(auth_handler)

urllib.request.install_opener(opener)

DATA = b'{"data": { "foo": "bar", "timestamp": 1466593290 }}'
try:
    req = urllib.request.Request('http://127.0.0.1/api/update', data=DATA, headers={'Content-Type': 'application/json'})    
    result = opener.open(req)
    messages = result.read()
    print (messages)
except IOError as e:
    print (e)