whats the difference between python 3.3 and 3.3m [duplicate]

What's the difference between python 3.3 and 3.3m

I'm using Ubuntu 13.04 Raring and on my system I have python2.7 and python3.3 (I know the differences between 2 and 3)

But I also have installed python3.3m (and it's not a symlink to 3.3). So what does the m stand for?

Is Python 3. 6 good?

Starting on 3.6 would not be a bad choice… It's syntactically easier and has some great additions. Though, overtime you will find yourself working with and in many different versions of Python(old and new) and this will be the case for your entire programming life. Should I learn Python 3.4 or 2.7?

What is python3 6m?

python3.6m: an interpreted, interactive, object-oriented programming language.

The m suffix means specifically a "pymalloc" build of Python, and it may mean that the ABI of 3.3 on your platform is not the same as the ABI of 3.3m. Extension modules must be built for the specific ABI in question. This means that 3.3 extension modules won't work with 3.3m and vice-versa.

The change to tag Python versions was proposed and accepted as PEP-3149: ABI version tagged .so files.