Error solution

[Sanjeev Trehan]

Dear All,
I am a new to Python,just started few days back.I have installed
Python23.exe.Also downloaded the totorial of Guido van Rossum 
Fred L. Drake, Jr., editor Release 2.3
July 29, 2003

When I write in command line the following eoors come:
>>> print a
File"<stdin>" Indentation error:Expected an indented block.
>>>lambda x:x+n
File"<stdin>" return^ lambda x:x+n
Indentation error:Expected an indented block.

Please solve my problem and explain from where should I start learning Python.
Waiting for reply.

Regards
Sanjeev