Python Import Error for modules installed with Homebrew
Question: I've already installed PySide using homebrew, but I get an error when my
scripts run things such as

    
    
    from PySide import QtWebKit
    

When I try `brew install pyside` I get an error that `pyside-1.2.0 already
installed`

When I try `pip install pyside` I get the following error:

    
    
    In file included from /Users/fitvalet/wgwt/env/build/pyside/sources/pyside/plugins/customwidgets.cpp:23:
    
    /Users/fitvalet/wgwt/env/build/pyside/sources/pyside/plugins/customwidget.h:27:10: fatal error: 'QtDesigner/QtDesigner' file not found
    
    fatal error: 'QtDesigner/QtDesigner' file not found
    
    #include <QtDesigner/QtDesigner>
    
         ^
    
    2 warnings and 1 error generated.
    
    make[2]: *** [plugins/CMakeFiles/uiplugin.dir/customwidgets.cpp.o] Error 1
    
    make[1]: *** [plugins/CMakeFiles/uiplugin.dir/all] Error 2
    
    make: *** [all] Error 2
    
    error: Error compiling pyside
    
    ...
    
    Command /Users/fitvalet/WGWT/env/bin/python -c 
    "import setuptools;__file__='/Users/fitvalet/WGWT/env/build/pyside/setup.py';exec(compile(open(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" 
    install --record /var/folders/rb/qjx8psqs3gj48qmpgbqqvrhc0000gn/T/pip-h69ltB-record/install-record.txt --single-version-externally-managed --install-headers 
    /Users/fitvalet/WGWT/env/include/site/python2.7 failed with error code 1 in 
    /Users/fitvalet/WGWT/env/build/pyside
    Storing complete log in /Users/fitvalet/.pip/pip.log
    

I also tried `easy_install pyside` and got this error:

    
    
    2 warnings and 1 error generated.
    make[2]: *** [plugins/CMakeFiles/uiplugin.dir/customwidgets.cpp.o] Error 1
    make[1]: *** [plugins/CMakeFiles/uiplugin.dir/all] Error 2
    make: *** [all] Error 2
    error: Setup script exited with error: Error compiling pyside
    


Answer: I figured out the problem by reinstalling the homebrew installation of PySide.

When you install using homebrew, you get a warning that

    
    
    For non-homebrew python (2.x), you need to amend your PYTHONPATH like so:
    export PYTHONPATH=/usr/local/lib/python2.7/site-packages:$PYTHONPATH 
    

Ran this and the module worked.

To make the change automatic rather than having to type the line each time I
opened a new terminal console, I needed to add that line to my ./bash_profile
file.

