viam-wrap

Important

This feature has been mainlined into the Viam Python SDK. See examples/easy_resource for the supported version of this. This repo is deprecated and unmaintained, and will be archived soon.

This is a python package providing viam-wrap, a command for running low-boilerplate python modules. It takes over entrypoint and registration logic.

Install in a fresh virtualenv with:

pip install git+https://github.com/viam-labs/1liner

Check out an example at mymodel.py, but it's basically:

#!/usr/bin/env viam-wrap
from viam.components.sensor import Sensor

class Model(Sensor):
    MODEL = "viam-labs:lowcode:sensor"

    async def get_readings(self, **kwargs):
        return {"success?": True}

Note the shebang calling viam-wrap. You can execute ./mymodel.py sock-path in a suitable virtualenv, and it will call the viam-wrap command with your module. A less magical way to do that is viam-wrap ./mymodel.py sock-path.

There's also a pyinstaller example to bundle these for distribution.

defaults

(todo: describe new() and reconfigure defaults)

todo

• does this work with pyinstaller? 1) can we pre-set the class(es), 2) will it detect the runtime imports
• accept multiple models
• if no class, use all Model subclasses from imported module
• dynamic meta.json?

dev instructions

To build for distribution:

pip install build # if you haven't
python -m build --sdist --wheel