I'm totally sure, but i have to question 2 things:
-Python 3 is automatically installed when we upgrade Ubuntu Precise Pangolin (12.04) to Ubuntu Trusty Tahr (14.04)?
-On Python 3 raw_input its no more employed for name inputs? now we can use just input?
I'm old school so i've used too much Python 2.7

Question

I'm totally sure, but  i have to question 2 things:
-Python 3 is automatically installed when we upgrade Ubuntu Precise Pangolin (12.04) to Ubuntu Trusty Tahr (14.04)?
-On Python 3 raw_input its no more employed for name inputs? now we can use just input? 
I'm old school so i've used too much Python 2.7

rsmith6559 · Answer

You're correct about raw_input().  I'm a CentOS fan, so I don't know Ubuntu, but I'd suspect that you could fairly easily install Python2.  Just for fun, I'd also do:

ls -l /usr/bin/*python*

Sometimes, python is just a symlink.

e.mccormick · Answer

Yah, there is a whole list of changes in 3. For example, they changed the division operator. http://www.informit.com/articles/article.aspx?p=1439189

opcode · Answer

Ubuntu Trusty Tahr comes with Python 3.4, as well as Python 2. When typing 'python' into terminal you access Python 2, type python3 to access Python 3.4