This folder also has a demo for using ndb from outside of App Engine. You can use `shell.py` to interact with your Datastore using ndb through the Cloud Datastore API.

1. First, ensure your environment is setup.

export DATASTORE_PROJECT_ID=<project-id>

export DATASTORE_USE_PROJECT_ID_AS_APP_ID=true

2. Then, make sure you have authenticated using gcloud.

gcloud auth login

3. Finally, run the shell. From here you can write ndb code to interact with Datastore. Don't forget, this shell is interacting with the production Datastore of your <project-id>.

python demo/shell.py

import atexit

import code

import readline

import os

import sys

import ndb

from ndb import tasklets

from ndb.google_imports import datastore_pbs

HISTORY_PATH = os.path.expanduser('~/.ndb_shell_history')

def shell():

if (not os.environ.get('DATASTORE_APP_ID', None)

and not os.environ.get('DATASTORE_PROJECT_ID', None)):

raise ValueError('Must set either DATASTORE_APP_ID or DATASTORE_PROJECT_ID'

' environment variable.')

ndb.get_context().set_memcache_policy(False)

ndb.get_context().set_cache_policy(False)

# ndb will set the application ID.

application_id = os.environ['APPLICATION_ID']

id_resolver = datastore_pbs.IdResolver((application_id,))

project_id = id_resolver.resolve_project_id(application_id)

banner = """ndb shell

""" % (sys.version, project_id)

imports = {

'ndb': ndb,

}

# set up the environment

os.environ['SERVER_SOFTWARE'] = 'Development (ndb_shell)/0.1'

sys.ps1 = '%s> ' % project_id

if readline is not None:

# set up readline

readline.parse_and_bind('tab: complete')

atexit.register(lambda: readline.write_history_file(HISTORY_PATH))

if os.path.exists(HISTORY_PATH):

readline.read_history_file(HISTORY_PATH)

code.interact(banner=banner, local=imports)

if __name__ == '__main__':

shell()