[mod_python] binary file, part II: name of file?

Hope this isn't as RTFM as my last post:

Is there anyway to specify programmatically a good default name for a
binary file?  My URL is /blah/objectDump?id=5, and the default
filename Windows gives for saving it is "objectDump"--I would like to
generate the filename and have it be something like
"forecast-object-5.txt'

Thx