[Tutor] what %s=%s means?

[Alan Gauld]

>I really new to python.I try on learning it by code examples.The
> following one from "Dive into python":

If you know another language then the official tutorial is the best
place to start, it explains all of the items on your question list.

Dive into Python is very good but it is really intended for 
intermediate
users who want to "dive into" the deeper areas, its not ideal as
a starter tutorial. Once you go through the official tutor then "Dive"
should make a lot more sense.

OTOH IF you are new to programming in general then the official
tutor might still be too deep. There is a non programmers page
on the python web site with a list of tutorials for absolute 
beginners.

Othrs seem to have answered most of your specific questions.

Alan Gauld
Author of the Learn to Program web site
http://www.freenetpages.co.uk/hp/alan.gauld