How do I install nose on a Mac for python 3

Question

I used easy_install to install nose on my Mac (OS Mavericks). It works fine with the default python 2.7 installation.

If I run nosetests on a module using python 3, it fails to find the imports. What do I need to know and do, to use nose for python 3 as well?

Answer 1

These are the steps that I found to work. Thanks, for the parts contributed by MattDMo.

# use python3 to unstall pip3
sudo python3 get-pip.py
which python3
# ls -l on the result of which to find the target of the link
# Using the path to the target (directory), set up links to pip3, pip3.3
ls -l /Library/Frameworks/Python.framework/Versions/3.3/bin/
ln -s /Library/Frameworks/Python.framework/Versions/3.3/bin/pip3 /usr/local/bin/pip3
ln -s /Library/Frameworks/Python.framework/Versions/3.3/bin/pip3.3 /usr/local/bin/pip3.3
# install nose for python3
# and set a link to the installation
sudo pip3 install nose
ln -s /Library/Frameworks/Python.framework/Versions/3.3/bin/nosetests-3.3 /usr/local/bin/nosetests-3.3

Answer 2

The best way to handle installation (and removal) of third-party packages is to use pip. First, download get-pip.py and save it someplace. Navigate to that folder in Terminal and enter

sudo python3 get-pip.py

to install it for Python 3. I'd recommend running

sudo python get-pip.py

as well to install it for Python 2, as easy_install is deprecated.

Once you have pip installed, you should have access to pip3 or pip-3.3 - check the installation directory to see exactly which scripts were installed. Assuming you have the command pip3, you can now run

sudo pip3 install nose

and it will install nose and any dependencies in your Python 3 site-packages folder, as well as a nosetests executable in your Python installation's bin folder.