Of note is the introductory page where it notes that your .bash_profile will be updated to point to Python 3.4.1 as the command "python3."on the command line, the system can find it. If you look at:you'll see that several older 2.x versions are already installed. Absolute beginner with no experience programming a computer.
You'll know you've been successful if you see the Python interpreter launch. To get to the latest 2.x version, and that shouldn't change because 2.x isn't being updated anymore, you can, on the command line, type: Alternatively, you can enter the commands python2.5 or python2.6 to get to those older versions if needed.6. There is a boatload of friendly information about Python at their website.
The default Python on OS X shouldn't be messed with as it's used by the OS itself.
If your default is 2.6.1 then you must have Snow Leopard.
Some major, very- and incompatibly-different versions get packages.
For instance, Python 2.6, Python 2.7, Python 3.1 all live in separate packages on Ubuntu.
As a result, the 3.x version can't be depended on to run 2.x scripts.
Have been faced with a couple of reinstalls thinking I could beat the system.
I wanted to know if there is a way to update a specific program from the command line, like will install latest available version, replacing the older one if needed.
But with some software (among which is Python) the situation is somewhat different.
Mac Ports puts everything into a separate direction (under /opt I believe), so it doesn't override or directly interfere with the regular system.
It has all the usually features of any package management utilities if you are familiar with Linux distros.