# Sage for physicists

I am a physics undergrad and thinking of learning a CAS. Though, mathematica is a standard choice, I would prefer a free open source software, because of a fetish, and the fact that I can't use mathematica outside my university. Is Python Sage used by physicists? Does it have the same functionality as mathematica.

Could you recommend me an online guide/manual or a book which teaches Sage with an emphasis for physics applications i.e. an equvalent to the A Physicist's guide to Mathematica book?