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Python implementation of a W3C WoT Runtime and the WoT Scripting API

Project description

WoTPy

Build Status Coverage Status

Introduction

WoTPy is an experimental implementation of a W3C WoT Runtime and the W3C WoT Scripting API in Python.

Inspired by the exploratory implementations located in the thingweb GitHub page.

Features

  • Supports Python 2.7, 3.6 and 3.7.
  • Fully-implemented WoT interface.
  • Multicast discovery based on mDNS.
  • Asynchronous I/O programming model based on coroutines.
  • Multiple client and server Protocol Binding implementations.

Feature support matrix

Feature Python 2.7 Python 3 Implementation based on
HTTP binding :heavy_check_mark: :heavy_check_mark: tornadoweb/tornado
WebSockets binding :heavy_check_mark: :heavy_check_mark: tornadoweb/tornado
CoAP binding :heavy_multiplication_x: :heavy_check_mark: chrysn/aiocoap
MQTT binding :heavy_multiplication_x: :heavy_check_mark: beerfactory/hbmqtt
mDNS discovery :heavy_multiplication_x: :heavy_check_mark: jstasiak/python-zeroconf

Couroutine APIs

WoTPy is based on the Tornado Framework. Users therefore have two different API options to write code based on coroutines:

  • Users on Python 3 may use the native asyncio module. This is, in fact, the recommended approach. It should be noted that Tornado on Python 3 acts basically as a wrapper around asyncio.
  • Users on Python 2.7 are restricted to writing Tornado coroutines (asyncio is not available on Python 2.7).

ToDo

  • Add missing sections to docs and deploy on a public site.
  • Subscription to Thing Description changes.
  • Validation of data schemas.
  • Enable Action handlers to return Observables.
  • Update protocol bindings to accept event subscription and cancellation data.

Installation

pip install wotpy

Development

To install in development mode with all the test dependencies:

pip install -U -e .[tests]

To run the tests in all supported environments:

WOTPY_TESTS_MQTT_BROKER_URL=mqtt://broker-url tox

Docs

Move to the docs folder and run:

make html

If you attempt to build the docs on a non-Linux platform or with Python 2.7 _autosummary will complain about being unable to import the unsupported modules (e.g. MQTT on Python 2.7). In this case the docs will be missing the sections regarding unsupported features.

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