The Python 3.0.1 Mac OS X installer image doesn't generate correct links for Python3.0 binary interpreter on /usr/local/bin (as the ReadMe says it will do). I'm using Mac Os X 10.5.6 (Darwin Kernel Version 9.6.0: Mon Nov 24 17:37:00 PST 2008; root:xnu-1228.9.59~1/RELEASE_I386 i386). Otherwise, Python 3.0 framework files seem to be correctly installed in /Library/Frameworks/Python.framework/Versions/3.0/, and running the interpreter from there works fine. Additionally, Python 2.5 and 2.3 are installed on /System/Library/Frameworks/Python.framework/Versions, and linked from /usr/bin/python. I'm not sure where did these come from, but I suspect they were installed with Xcode 3.1.2. Find the Python 3.0.1 install log attached (I tried to install it twice, disregard the second time). If you need more info, just ask.
The ReadMe is not quite correct. For 3.x, the OS X installers do not by default install links in /usr/local. Note that the installer's Welcome screen correctly notes this. To install the /usr/local/ links, you need to go back to the Installer, select Customize, and then select the "UNIX command-line tools" package. The python files in /System/Library are supplied by Apple in OSX 10.5 and, as with everything else in /System/Library, should not be disturbed. None of this has anything to do with Xcode.
messages: + title: Python 3.0.1 doesn't install correctly on Mac Os X 10.5.6. with xCode 3.1.2 -> Python 3.0.1 Mac OS X install image ReadMe is incorrect