Few questions about new features in Python 2.2

[sebastien]

Thank's for your responses. 
I should have found all of theim myself :-(

More ironically I've said that:

- My computer should be able to potentialy save the state of all the
universe. (If someone has a recipe for that, I'm interested)

- Immutables types should accept side effect methods (Bacward
incompatibilities should be very marginal after all...)

- 5.4 // 2.0 should equal 2.7 (oh yes that's so usefull!) 

Well, probably not a good day for my brain ;-)

I've really underestimated the generality of theses concepts.