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From: Lawrence D'Oliveiro <ldo@nz.invalid>
Newsgroups: comp.lang.python
Subject: Re: Best (simplest) way to share data (Posting On Python-List
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Date: Tue, 9 Jul 2024 05:52:53 -0000 (UTC)
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On Mon, 8 Jul 2024 13:56:34 +0100, Chris Green wrote:

> Lawrence D'Oliveiro <ldo@nz.invalid> wrote:
>>
>> If it’s a snapshot of current values, that does not persist when the
>> collector process is not running, then why not just keep the data in
>> the memory of the collector process, and have it concurrently listen on
>> a socket for connections from readers requesting a copy of the current
>> data?
> 
> That's exactly the sort of solution I was wondering about.  Is there a
> ready made module/library for handling this sort of thing?  Basically it
> will just be a string of a few tens of characters that would be kept up
> to date by one process and asked for by all the others.

You probably don’t need to define any nontrivial kind of protocol at all. 
Just accept a connection from a client, send it the current data in some 
convenient format (e.g. JSON), and disconnect.