Vantiq SDK for Python

The Vantiq Python SDK is a Python package that provides an API into a Vantiq system from Python applications. The SDK connects to a Vantiq system using the Vantiq REST API.

Installation

The SDK is installed from the PyPI repo. To install this into your system, use

    pip install vantiqsdk

Note: depending on your local environment, you may need to use pip3 instead of pip, or whatever is appropriate to install into your virtual environment.

The Vantiq SDK for Python requires Python version 3.10 or better. It is built using asyncio, aiohttp, and websockets. In the documentation that follows, methods marked as Async must be awaited. For more information about asyncio and await, please see the Python asyncio documentation).

Quick Start

You will need valid credentials on a Vantiq server in the form of a username and password or access token. If you have a private Vantiq server, contact your administrator for credentials. If you wish to use the Vantiq public cloud, contact support@vantiq.com.

The first step is to create an instance of the Vantiq SDK providing the URL of the Vantiq server to connect:

from vantiqsdk import Vantiq, VantiqResources, VantiqResponse
import vantiqsdk

server: str = "https://dev.vantiq.com"

vantiq: Vantiq = Vantiq(server)

where server is the full URL for the Vantiq server to connect to, such as https://dev.vantiq.com/. An optional second argument is the version of the API to connect to. If not specified, this defaults to the latest version, currently 1. At this point, the Vantiq instance has not yet connected to the server.
To establish a connection to the server, use the authenticate method, e.g.,

username = "joe@user"
password = "my-secr3t-passw0rd!#!"

await vantiq.authenticate(username, password)

The username and password are the same credentials used to log into the system. Note the username and password are not stored either in-memory or persistently after this authentication call. After successfully authenticating with the system, the Vantiq instance stores an in-memory access token that subsequent API calls will use.

Now, you are able to perform any SDK calls to the Vantiq server. The async methods on the SDK classes can be immediately awaited to run in, effectively, a synchronous fashion, or they can return an Awaitable that can be awaited later.

vr: VantiqResponse = await vantiq.select(VantiqResources.TYPES)

Alternatively,

to_await = vantiq.select(VantiqResources.TYPES)
...
vr: VantiqResponse = await to_await

In either case, the response to the operation is available in the VantiqResponse instance.

Documentation

For the full documentation on the SDK, see the SDK API Reference.

Developers

The project is set up as a gradle project. To run the tests, use

./gradlew test

or

gradlew.bat test

in a windows environment.

The tests run will run a mocked version. To execute tests against a live server, define the following gradle properties in your ~/.gradle/gradle.properties file:

# Python project values
TestVantiqServer=<Vantiq server url> # Only do the base URL. Ex http://localhost:8080/
TestAccessToken=<access token from that Vantiq system>
TestVantiqUsername=<Vantiq user name>
TestVantiqPassword=<Password for that Vantiq user>

Alternatively, when running directly, use the following environment variables:

VANTIQ_URL <Vantiq erver url>
VANTIQ_ACCESS_TOKEN <Access token from that Vantiq system>
VANTIQ_USERNAME <Vantiq user name>
VANTIQ_PASSWORD <Password for that Vantiq user>

Copyright and License

Copyright © 2022 Vantiq, Inc. Code released under the MIT license.