How/where to store calibration values - written by program A, read by program B

[Peter J. Holzer]

On 2023-12-28 05:20:07 +0000, rbowman via Python-list wrote:
> On Wed, 27 Dec 2023 03:53:42 -0600, Greg Walters wrote:
> > The biggest caveat is that the shared variable MUST exist before it can
> > be examined or used (not surprising).
> 
> There are a few other questions. Let's say config.py contains a variable 
> like 'font' that is a user set preference or a calibration value 
> calculated by A to keep with the thread title. Assuming both scripts are 
> running, how does the change get propagated to B after it is set in A

It isn't. The variable is set purely in memory. This is a mechanism to
share a value between multiple modules used by the same process, not to
share between multiple processes (whether they run the same or different
scripts)

> and written to the shared file?

Nothing is ever written to a file.

You could of course write python files from a python script (in fact I
do this), but that's not what this pattern is about, AFAICS.

        hp

-- 
   _  | Peter J. Holzer    | Story must make more sense than reality.
|_|_) |                    |
| |   | hjp at hjp.at         |    -- Charles Stross, "Creative writing
__/   | http://www.hjp.at/ |       challenge!"
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