Okay- that is a lot trickier. Here's some yucky code that uses the exec command to accomplish the same goal... but it's definitely not the elegant solution you are looking for...
q = [] for key, value in request.GET.items(): q.append ( "%s = %s" % (key, value) ) q = ", ".join(q) print q cmd = "milestones_list = milestones.get_values(%s)" % q exec cmd