Python 2 or 3

[Antti J Ylikoski]

I'm in the process of learning Python.  I already can code
objet-oriented programs with the language.  I have in my hands the
O'Reilly book by Mark Lutz, Programming Python, in two versions: the
2nd Edition, which covers Python 2, and the 4th edition, which covers
Python 3.

In the "official Python site" so to speak, http://www.python.org, it
is mentioned that the authors recommend the visitor, who is a novice,
to learn Python 2 rather than Python 3, because most of existing
software has been writen with Python 2.

The O'Reilly book has some 1200 pages.  I would not want to invest
such an amount of work and time to an obsolete language (i. e. Python
2).

What is the opinion of the wizards here, shall I learm Python 2 or
Python 3?  I'm posting this here because I feel that this point is
interesting to other students of Python.


Cheers, Antti "Andy" Ylikoski
Helsinki, Finland, the EU