anydbm safe for simultaneous writes?

[chris]

I need simple data persistence for a cgi application that will be used
potentially by multiple clients simultaneously.  So I need something
that can handle locking among writes.  Sqlite probably does this, but
I am using Python 2.4.4, which does not include sqlite.  The dbm-style
modules would probably be fine, but I have no idea if they are "write
safe" (I have no experience with the underlying unix stuff).  Any tips
appreciated.

Thanks,
Chris