You probably should not be using raw POST requests to use Datastore, instead use the gcloud library to do the heavy lifting for you.
I would also recommend the Python getting started page, as it has some good tutorials.
Finally, I recorded a podcast where I go over the basics of using Datastore with Python, check it out!
Here is the code, and here is an example:
#Import libraries
from gcloud import datastore
import os
#The next few lines will set up your environment variables
#Replace "YOUR_RPOEJCT_ID_HERE" with the correct value in code.py
os.environ["GOOGLE_APPLICATION_CREDENTIALS"] = "key.json"
projectID = "YOUR_RPOEJCT_ID_HERE"
os.environ["GCLOUD_TESTS_PROJECT_ID"] = projectID
os.environ["GCLOUD_TESTS_DATASET_ID"] = projectID
datastore.set_default_dataset_id(projectID)
#Let us build a message board / news website
#First, create a fake email for our fake user
email = "[email protected]"
#Now, create a 'key' for that user using the email
user_key = datastore.Key('User', email)
#Now create a entity using that key
new_user = datastore.Entity( key=user_key )
#Add some fields to the entity
new_user["name"] = unicode("Iam Fake")
new_user["email"] = unicode(email)
#Push entity to the Cloud Datastore
datastore.put( new_user )
#Get the user from datastore and print
print( datastore.get(user_key) )
This code is licensed under Apache v2
