On Apr 6, 12:44 pm, Piet van Oostrum <p... at cs.uu.nl> wrote: > 3. See also http://code.activestate.com/recipes/465156/ Thank you for the useful suggestions Piet. In particular I just had a look at the SharedLock class provided through the link above and it seems to fit the bill quite nicely. I'll give it a go! Thank you again! Manu