On 3/31/20 8:00 PM, Dieter Maurer wrote:
Stephan Lukits wrote at 2020-3-31 17:44 +0300:
background:
- a daemon creates package p1 (e.g. directory with __init__.py-file) and
in p1 a module m1 is created.
- Then the daemon wants to import from m1, which functions (so far all
the time).
- Then a module m2 is created in p1 and the daemon wants to import from
m2 which fails (most of the time but *not* always) with ModuleNotFoundError.
See the little test script at the end which reproduces the problem.
...
I remember a similar report (some time ago). There, caching has
been responsible. I have forgotten how to invalidate the caches.
But, you could try logic found in
`importlib._bootstrap_external.PathFinder.invalidate_caches`.
Yes, removing the entry for p1 from 'sys.path_importer_cache' seems to
solve the problem.
Thank you.
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