Can't find python

[skotl (Scott)]

Hi all

I’ve got a simple python script that fetchs data from a remote web source however I’m having some odd problems with getting it to run via python.
When I start an ssh connection (via “Terminal and SSH” add-on) there is no python or python3 on the filesystem.

I then added python via apk add python3 and that worked fine - script executed as expected.
I then added the script as a “shell_command” and in configuration.yaml and restarted the raspberry pi to force it to re-read the yaml (perhaps overkill?).

Anyways, the script doesn’t execute and python has gone from the system! If I didn’t know better I’d say there was some kind of sandbox / container that the “Terminal and SSH” was landing me in, and that this isn’t being persisted on a reboot?

So two questions:

1. Does “Terminal and SSH” execute in a sandbox (least important question)
2. How do I persuade a “shell_command” to execute a python script? (most important question)

Thanks!

[francisp (Francis)]

@skotl

Does “Terminal and SSH” execute in a sandbox (least important question)

Not in a sandbox, you arrive in the HA docker container, not the OS.

@skotl

How do I persuade a “shell_command” to execute a python script? (most important question)

Don’t know.
For simple scripts, try the python integration

Python Scripts

For more advanced scripts, try pyscript :

Pyscript - new integration for easy and powerful Python scripting

Pyscript is a new integration that allows you to write Python functions and scripts that can implement a wide range of automation, logic and triggers in a very simple manner. State variables are bound to Python variables, and services are callable as Python functions, so it’s easy and concise to implement logic. Functions you write can be configured to be called as a service or run upon time, state-change or event triggers. Functions can also call any HASS service, fire events and set state var…

[nickrout]

Or Appdaemon.

[VDRainer]

Ha runs in python so it’s available in the HA container.
Read here how to access the HA container.

[skotl (Scott)]

Thanks everyone.

Firstly for the confirmation that hass is container-based: that explains the behaviour I was seeing (and now I understand that the key folders like /config are mapped into the container).

Also for the pointer toward appdaemon. I’d looked at this way back when I started researching HomeAssistant (last Monday ) and thought it was overkill for what I needed, however now reading through the documentation I am concluding that AD is what I’m looking for.

I’m really impressed at the simplicity and completeness of the out-of-the-box (including integrations) solution but there’s clearly a bit of a leap jumping from “standard” to building custom solutions. That’s not a problem as I’m a software engineer to trade, and it looks like a lot of clear thought and experience has gone into the architecture of HA.
I’ll now finish reading the documentation before returning to the task at hand!

Cheers