Can I have both Python 2.7 and Python 3.1 at the same time on the Mac?

[Alice Bevan–McGregor]

On 2011-01-06 11:44:13 -0800, Bill Felton said:
> I've also seen various resources indicate that one can install both 
> Python 2.7 and Python 3.1 -- but when I did this, I get no end of 
> problems in the 2.7 install.

I have Apple's native Python installations (2.5 and 2.6, I believe), 
plus Python 2.7 and 3.1 from the Python.org site (.pkg installers) 
installed simultaneously without a problem, but I don't use Python GUI 
toolkits on my Mac.

Still waiting on a .pkg installer for 3.2b2, though.  :(

	- Alice.