How to have Bio.Blast NCBIWWW return an .xml file to my hard disk

Question

[mfeather]

I've been acquiring basic Python skills over the last few months and am now learning how to apply these skills and new ones to bioinformatics. I've just gotten started with a few "simple" Biopython tools and am a bit stumped on the following. I am able to run Bio.Blast with import of NCBIWWW and NCBIXML to obtain a screen print out of the results, but what I would really like is a file on my hard drive, for example, my_blastn_result.xml, for both the NCBIWWW and NCBIXML stages of the run. I can't believe there isn't a way to do this, but for the life of me I cannot find it in the Biopython documentation. Any help would be much appreciated.