Handling of additional python dependencies

[Claudius Heine <claudius.heine.ext@siemens.com>]

Hi,

I am currently creating a proof of concept implementation for the 
caching apt repo proxy for isar.

My goal was to create this using asyncio, but the python std lacks a 
async http protocol implementation. I tried using as much as I can from 
the sync version of the http protocol that is available the python std 
lib, but that is not that trivial to do. I am now at the point where I 
have to decide if I just used some http asyncio library outside of the 
std or try another route with this. Maybe just use the sync version and 
slap more threads on it.

How is the policy concerning external python dependencies and isar?
Is it possible to just copy those libraries into the scripts/lib/ 
directory, specify it as a host dependency or am I forced to only use 
the python std?

Thanks,
Claudius

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