问题
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('modules') command and the scipy port did not come up.
Clearly the path is not configured correctly or MacPorts is not installing in the correct place, but either way, it would solve my problem to know where this package is being installed.
Where can I find the path to MacPorts-installed package, py27-scipy?
Output of echo $PATH command:
/Library/Frameworks/Python.framework/Versions/2.7/bin:/opt/local/bin:/opt/local/sbin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin:directory/bin
I cannot find the package in any of those locations.
Thanks for the help.
回答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
回答2:
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.
回答3:
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"
回答4:
sudo port select --set python python27
is the best answer to install port's python system-wide
回答5:
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.
来源：https://stackoverflow.com/questions/6147035/locate-macports-package