Mike D wrote: > Hello, I've just picked up the Python language and am really enjoying it. > > I've just signed up to this mailing list and I'm looking forward to > taking part in some discussions. > > My first post is a question I've been pondering for the last couple of days: > > For relatively static data (such as a list), is it possible to load a > single instance and have many python processes access it? > First there's the problem of having multiple processes access any kind of shared resource. So your question makes me wonder whether you mean processes, or threads. Are you *sure* you mean processes?
> I want to have an object in memory. This object will be loaded on > application start up and will contain a list of objects. These will be > obtained from (most likely) the file system. > So "application startup" is different from "process startup"? Your application is a group of co-operating processes? Really? > My reasoning is: I want to prevent a file system or database fetch each > time as it seems unnecessary. > It might also seem unnecessary to start the Python interpreter for each process, but you are going to have to ... > Is this possible? In Java I'm pretty sure this could implemented with an > object factory and static methods. My understanding is that python > invokes a separate process for each request however. > Your understanding is clearly informed by some information you have omitted to share with us. > If possible, what would be a good way of providing a new structure as it > is updated. > > If anyone could give me some advice or point me in the correct direction > I'd really appreciate it. > > Thanks in advance, > More answers, please. There are mechanisms such as Pyro (Python remote objects) that allow inter-process method calls, but I am far from convinced that's what you really want (or need, anyway). Perhaps yo could let us know a little more about what it really is you are trying to do, and convince me, at least, that this isn't just a case of premature optimization. regards Steve -- Steve Holden +1 571 484 6266 +1 800 494 3119 Holden Web LLC http://www.holdenweb.com/ -- http://mail.python.org/mailman/listinfo/python-list
