Configure Python 3 Without Losing Python 2 On Mac OS X

gistfile1.txt

# This code needs to be placed within the .bash_profile file of the user's home directory
# You can use a text editor such as Text Wrangler.app downloaded from the following
# link to create or edit the file .bash_profile, which is an invisible file because it begins
# with a dot.
# TextWrangler: http://www.barebones.com/products/textwrangler/download.html

# set the path to our Python Library
# require that '$HOME' be set to a dir
if [ -d "$HOME" ]; then
	# set the path to our PYTHON_LIB
	PYTHON_LIB="${HOME}/Sites/public_html/lib/python" ###### set PYTHON_LIB to your Python 3 
	# if '$PYTHONPATH' is set, then add our PYTHON_LIB to PYTHONPATH
	if [[ "$PYTHONPATH" ]]; then
		export PYTHONPATH="${PYTHONPATH}:${PYTHON_LIB}"
	# else, PYTHONPATH isn't set so just set it to our PYTHON_LIB
	else
		export PYTHONPATH="${PYTHON_LIB}"
	fi
	# make PYTHONPATH available outside of this script
	export PYTHONPATH
else
	# write to stderr because there was an error
	echo ".bash_profile: \$HOME \"$HOME\" is not a directory, so the path PYTHON_LIB could not be set: " >&2
fi