How do I "lock" zodb objects? I want the following process: See if key is present in root. [it's not] Lock key write-access, so that no other client will try to write key. Compute value for key. Write value for key. Unlock key. How do I achieve this? Thanks! Joseph -- Academic: http://www-etud.iro.umontreal.ca/~turian/ Business: http://www.metaoptimize.com/