use urllib to post with basic auth

urllib.py

import base64
from datetime import datetime
import urllib.request
import urllib.parse

data = urllib.parse.urlencode({'recorded': datetime.utcnow(), 'product': 'LALA', 'amount': 20000}).encode()
url = 'http://localhost:8000/api/'
request = urllib.request.Request(url)
credentials = ('%s:%s' % ('user', 'pass!'))
encoded_credentials = base64.b64encode(credentials.encode('ascii'))
request.add_header('Authorization', 'Basic %s' % encoded_credentials.decode("ascii"))
resp = urllib.request.urlopen(request, data=data)
text = resp.read().decode('utf-8')
print(text)