Save a Blenderfile with PythonScript??

I really got a Problem here. I have a python script which sets some Action Ipos after it did that I want to automatiically save the blend file I used but with an other name, so what I try is:

  1. Open Blend File
  2. Start Python Skript fpr Action Ipos (Alt P)
  3. Now I want to save my blend File with the new name blend_test.blend over a python script too!

Can I and if yes how can I do that??

Thanx already