Custom component can't install pytorch?

Development
1

Hi,

I am building a custom component that uses pytorch, but HA is unable to find it:

{
  "domain": "blah",
  "name": "blah",
  "codeowners": ["@kerryland"],
  "config_flow": false,
  "version": "0.9.0",
  "dependencies": ["conversation"],
  "integration_type": "service",
  "iot_class": "local_polling",
  "requirements": ["torch"]
}

HA logs show:

2023-07-21 16:45:27.375 ERROR (SyncWorker_4) [homeassistant.util.package] Unable to install package torch: ERROR: Could not find a version that satisfies the requirement torch (from versions: none)
ERROR: No matching distribution found for torch

I’m kinda stumped at the first hurdle. I can install it just fine outside of HA. I am definitely not a Python guru.

PS: Running on a Pi4. Home Assistant 2023.7.1 Supervisor 2023.07.1 Frontend 20230705.1 - latest.

2

You might need to specify the (exact or minimum) version of your dependency.

3

Thanks for the thought, but by not specifying a version number I’m saying that I’ll take anything.

The problem is specific to “torch”. Why can’t HA find it?

4

I’ve made a small amount of progress, but would still love some help. I understand that requirements entries are pip compatible strings, and I see there is an HA example that pulls directly from git, rather than whatever repo HA is using:

"requirements": ["git+https://github.com/issacg/pycoolmaster.git@except_connect#pycoolmaster==0.2.2"]

I am able to pull pytorch from their site with this pip command locally (note that it is not a git repo)

pip3 install torch==1.13.1 -f https://download.pytorch.org/whl/torch_stable.html

…but I can’t find a way to squish the project name into the URL. None of these work as “requirements”

https://download.pytorch.org/whl/torch_stable.html@torch==1.13.1
https://download.pytorch.org/whl/torch_stable.html#torch==1.13.1
https://download.pytorch.org/whl/torch_stable.html@#torch==1.13.1
https://download.pytorch.org/whl/torch_stable.html#egg=torch

Does anybody have the magic incantation, or an explanation why ‘torch’ doesn’t “just work” in the first place?

If not I’ll raise a bug request and see if the developers want to help.

Cheers
Kerry

5

Hey @kerryland the reason pip complains that it can’t find a matching distribution for pytorch is because the home assistant core docker container running on your raspberry pi is built on top of Alpine linux, and PyTorch isn’t currently compatible with Alpine linux. You can read some more context about the problem in this GitHub issue.

I ran into the same issue trying to create a Home Assistant addon that uses pytorch as a dependency.

Hope this helps the next person.