Thanks for your valuable suggestions. I am just looking to start with Python, so I needed some basic commands which I think I could get from your link. If I need more suggestion further in future, I will contact you.
Documentation and quick tutorials are the best way to get the overall idea how the language works and to get "introduced" to the development environment.
Later on a book would be good so that you can work on the basics from bottom to top and of course, in the end, documentation, sources and coding come after the "how to start" bit.
You could sign up for the free course "An Introduction to Interactive Programming in Python" on Coursera [see the web site for more information: https://www.coursera.org/course/interactivepython], which starts on October 7th 2013 and runs for 9 weeks. This course makes learning Python much fun, I enjoyed it very much during previous session. It would be wise to get some Python knowledge before you start, because otherwise it can be quite challenging.
If you are a programming beginner you could consider the book "Invent Your Own Computer Games With Python".
Also the free UDACITY online course "Introduction to Computer Science" uses Python to introduce students to programming. I decided to use this course for learning Python as it is very relaxing to watch in the evening after a long day of work at the university.