Am 03.05.2011 17:51 schrieb Paul Kraus:
     import_flag.flag_value = 1
     transaction.commit()
    ... # Do stuff
     import_flag.flag_value = 0
     transaction.commit()

You probably need to re-add import_flag to the session after the first commit because it empties the session, i.e.

DBSession.add(import_flag)

Anyway, a semaphore or lock seems to be a better solution.

-- Christoph

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