如何在python中异步处理xml？

I have a large XML data file (>160M) to process, and it seems like SAX/expat/pulldom parsing is the way to go. I'd like to have a thread that sifts through the nodes and pushes nodes to be processed onto a queue, and then other worker threads pull the next available node off the queue and process it.I have a large XML data file (>160M) to process