Locate MacPorts package?

Question

I just installed the py27-numpy package via MacPorts and python will not find the module when I use this command: import scipy

I used the help(\'m

Answer 1

Your PATH is incorrect. It appears to be picking up another Python 2.7, likely one installed using a binary installer from python.org or elsewhere, and not the MacPorts installed one. Try removing the the /Library/Frameworks/Python.framework/Versions/2.7/bin from PATH or just invoke the MacPorts Python directly:

/opt/local/bin/python2.7

Answer 2

sudo port select --set python python27

is the best answer to install port's python system-wide

Answer 3

Based on Jeremy W. Sherman's answer

I checked my python version

python --version
Python 3.8.5

and location:

which python
/opt/local/bin/python

and then tried:

sudo port contents python38 

which lists 7285 lines:

Port python38 contains:
  /Applications/MacPorts/Python 3.8/IDLE.app/Contents/Info.plist
  /Applications/MacPorts/Python 3.8/IDLE.app/Contents/MacOS/IDLE
  /Applications/MacPorts/Python 3.8/IDLE.app/Contents/MacOS/Python
  /Applications/MacPorts/Python 3.8/IDLE.app/Contents/PkgInfo
  ...
  /opt/local/share/man/man1/python3.8.1

combining that with fardjad's answer leads to:

sudo port contents python38 | grep site-packages

with the output:

/opt/local/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/README.txt

since we need the directory modifying the command to:

dirname $(sudo port contents python38 | grep site-packages)

gives the desired directory:

/opt/local/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages

so it's possible to end up with the one-liner:

One-Line PYTHONPATH setting in macports:

 export PYTHONPATH=$(dirname $(sudo port contents python38 | grep site-packages))

and we can check the result:

echo $PYTHONPATH
/opt/local/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages

For reference see how the Eclipse Liclipse python IDE dialog for setting the PATH looks - there are some more directories you might want to include for a fully specified PYTHONPATH.

Answer 4

To find the location of installed components, use the contents subcommand:

port contents py27-numpy

As for getting python to find the package, see @fardjad's response.

Answer 5

MacPorts should install Python packages in /opt/local/Library/Frameworks/Python.framework/2.7/site-packages by default. So make sure to set $PYTHONPATH environment variable in your .profile file:

export PYTHONPATH="/opt/local/Library/Frameworks/Python.framework/Versions/2.7/site-packages"

Answer 6

With Homebrew only using the latest, the Mac system version, and MacPorts for the others in-between, I was confused until I found python locations differ depending on the installer.

Here's an opinionated tip: Use virtualenvs for your projects and don't change your default version with the MacPorts. I won't and don't want to remember to updoot my python in the middle of something so I rely on virtualenvs. Choose and find the python version on the computer, then mkvirtualenv --python=/found/u/python3.X getawesome.