[Python-Dev] Mysterious Python pyc file corruption problems

Greg Ewing greg.ewing at canterbury.ac.nz
Fri May 17 00:27:01 CEST 2013

Guido van Rossum wrote:
> This reminds me of the following bug, which can happen when two
> processes are both writing the .pyc file and a third is reading it.
> ...  I think all the errors are
> actually explainable from this scenario.

The second writer will still carry on to write a valid
.pyc file, though, won't it? So this wouldn't result in
a permanently broken .pyc file being left behind, which
is what the original problem description seemed say
was happening.


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