[Python-Dev] possible bug in python importing pyc files
"Martin v. Löwis"
martin at v.loewis.de
Tue Dec 1 19:12:32 CET 2009
> The code that shows this problem is owned by my company, I'm not sure
> if I would be able to produce it to create a bug report. But I do have some time
> to help debug the problem.
> What steps should I take to try to isolate the problem?
Try isolating the precise instruction that behaves incorrectly (when the
.pyc is present). If you have already a failing test case, this should
be fairly easy to do. Some variable apparently has a value that it must
not have, or some operation yields a result that it must not yield. Find
out where it first behaves incorrectly in the failing case.
To do so, you may want to familiarize with pdb. Put
into the failing test case, and try single-stepping through it. Make
sure stdin/stdout doesn't get redirected, since that confused pdb.
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