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

