write to the same file from multiple processes at the same time?

[jean-marc]

Sorry, why is the temp file solution 'stupid'?, (not
aesthetic-pythonistic???) -  it looks OK: simple and direct, and
certainly less 'heavy' than any db stuff (even embedded)

And  collating in a 'official log file' can be done periodically by
another process, on a time-scale that is 'useful' if not
instantaneous...

Just trying to understand here...

JMD