[Zope] External method writing to a log

I want to create an external method to append to a log file (for almost every access to the Zope site). Obviously opening and closing files this often is going to get a bit silly. Is there a way to keep a file open for the whole time that the Zope server is running? Or do I need to create some completely separate OS-level process that handles the file, and just gets called by the external method? Cheers, Martin -- ### Martin Dougiamas ### ### http://dougiamas.com ### ### martin@dougiamas.com ###