Facing problem in running program and need a solution

Hello, I am new to python. stared learning python only. At first , I downloaded python 2.4 and there i had run some program successfully. But today I downloaded python 3.3. I tried to run those program in python 3.3 which i run in python 2.4 successfully but those programs are not working in 3.3. i didn't make any changes in program. it shows syntax error every time. I am not understanding whats happening.

Python 2 and 3 have different syntax rules. You'll have to read the differences on the website. If you're just learning, stick with Python 2.x

Python 2 code will note run in python 3

The most likely problem is print.
In python3 print is a function, not a statement.

print 'my string'
is a python 3 syntax error just as is
math.sin math.pi/3


raw_input no longer exists in python3, although that wouldn't cause syntax error.


Use python's 2to3 tool to convert your program from version 2 to version 3. The program handles most everything. On my system (shell prompt "$ " it is)

$ 2to3-2.7 --help

I've only used it once myself, but then again I started using python3 while it was an early beta release.

If I learn python 2.x and after that when I will start learning 3.x ,will I have to learn form the beginning ? or 2.x and 3.x are same without some differences?

I am interested in python 3.x . can you please give me some links for python 3.x tutorial?

Guido handed out a short python3 cheat sheet at one of the python conferences. Mine is long lost, and I don't see it on the web.
Here find a longer one.

Look up python3k, python3000, and the PEPs starting from number 3000.

GVR on python3
http://www.python.org/dev/peps/pep-3000/

Thank you