Question

I would like to try out the Google App Engine Python environment, which the docs say runs 2.5.2. As I use OS X Leopard, I have Python 2.5.1 installed, but would like the latest 2.5.x version installed (not 2.6 or 3.0). It seems the latest version is 2.5.4

So, I went to here:

http://wiki.python.org/moin/MacPython/Leopard

and stopped because I am worried installing the latest version might mess with the standard install. I really just want one version installed.

So my questions are how do I safely install the latest 2.5.x? Is it possible to fully replace the built in version, and if so would that hurt any Mac tools?

Cheers,
Shane

Answer 1

You can install python on your Mac, and it won’t mess with the default installation. However, I strongly recommend that you use MacPorts to install Python, since that will make it much easier for you to install Python libraries and packages further down the road. Additionally, if you try to install a program or library with MacPorts that depends on Python, MacPorts will download a copy of Python, even if you have MacPython installed, so you might end up with redundant copies of Python if you install MacPython but then choose to use MacPorts at a later date. To install Python with MacPorts, download and install MacPorts, then type:

sudo port install python25 python_select
sudo python_select python25

Run the following command to view all the MacPorts packages for Python:

port list | grep py25-

You can install any of the packages on the list by simply typing:

sudo port install packagename

In the above, replace packagename with the name of the package. On my first install I always run

sudo port install py25-setuptools

[ NOTE: These commands need to be run from the Terminal — Applications > Utilities > Terminal.app ]