Python is a versatile scripting language with a vast system library allowing you to do just about everything from low-level file and socket access to desktop gui applications using things like Wx and even Qt.
The tutorials on this site are based around version 2 of the language, which is still what you are most likely to find on systems out there. Do not fear: version 3 is supposed to be nearly completely backward compatible with 2, so your learning will not go to waste. There are some minor differences; "print," for example, is a function in version 3, but a keyword in version 2.
1) Intro - Get Python and make sure it works.
2) Hello World - Create an actual source file, gather user input, and display results.