Mod:Hunt Research Group/MacPorts

MacPorts

• installing MacPorts

• find installation information here link
• find general information here link
• download and follow the instructions
• macport installs in /opt/local so add to your path "export PATH=/opt/local/bin:/opt/local/sbin:$PATH"
• after a major OS upgrade you will need to install a new MacPorts

• using MacPorts basic commands

• you will need to run all commands as sudo
• general commands

port version

sudo port selfupdate

port installed

port outdated

port upgrade

port uninstall code_name

port activate code_name

• search for particular codes, in this case for python versions, generally or installed on this machine

port search --name --line --glob 'python*'

port installed 'python*'

port select --list python

port select --set python3 python37

port select --set python2 python27

port select --set python python37 or which ever version you want

do the same for pip

port search --name --line --glob '*pip'

port install py27-pip

port install py37-pip

port select --set pip2 pip27

port select --set pip3 pip37

port select --set pip pip37 or which ever version you want

• problems

python versions

the Mac (Sierra) has a preinstalled version of python in /user/local/bin

the Mac (Mojave) has a preinstalled version of python in /user/bin

python.org installs in /Library/Frameworks/Python.framework/Versions/3.5/bin and so on

macports installs in /opt/local/bin

to find out which version is being used type "which python"

to find out the version of python used "python -V"

or "python --version"

to ensure the macports version is used in your $PATH make sure /opt/local/bin occurs before /user/bin

sometimes other initiating files add things to your path, so key an eye on this variable

choose in what order to search the relevant directories

for example

   export PATH="/opt/local/bin:/opt/local/sbin:$PATH"
   export PATH=$PATH:/Users/$USER/bin
[tricia@clove]/Users/tricia $ echo $PATH
/opt/local/bin:/opt/local/sbin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Users/tricia/bin
[tricia@clove]/Users/tricia $

pip versions

pip3 --version delivers 3.5 and not 3.7

which pip shows /opt/local BUT pip3 shows /usr/local

so pip3 is from the wrong installation of python

sudo port select --set pip pip27 works BUT sudo port select --set pip3 pip37 fails!

so force the use of python3: sudo -H python3 -m pip install .