Where the Packages are installed?

Deafult Python packages are installed in : /usr/lib/python2.7

argparse.py , os.py, calender.py, glob.py..............are default python modules.

External or Third party Modules are in : /usr/lib/python2.7/dist-packages/

 

 

Files will be installed into subdirectories of site.USER_BASE (written as userbase hereafter). This scheme installs pure Python modules and extension modules in the same location (also known as site.USER_SITE). Here are the values for UNIX, including Mac OS X:

Type of file	Installation directory
modules	userbase/lib/pythonX.Y/site-packages
scripts	userbase/bin
data	userbase
C headers	userbase/include/pythonX.Y/distname

Examples:
 To locate where opencv's 'cv2.so' files installed?

sudo find / -name "cv2.so"  

/home/arun/opencv/build/lib/cv2.so
/usr/local/lib/python2.7/dist-packages/cv2.so

python notebook has to be aware of this location so that it recognises cv2 while importing. Lets check it out in the notebook.

print os.sys.path                          

['', '/usr/lib/python2.7', '/usr/lib/python2.7/plat-i386-linux-gnu', 

'/usr/lib/python2.7/lib-tk'

, '/usr/lib/python2.7/lib-old', '/usr/lib/python2.7/lib-dynload', 

'/usr/local/lib/python2.7/dist-packages', 

'/usr/lib/python2.7/dist-packages', '/usr/lib/python2.7/dist-packages/PILcompat', 

'/usr/lib/python2.7/dist-packages/gtk-2.0', '/usr/lib/pymodules/python2.7', 

'/usr/lib/python2.7/dist-packages/ubuntu-sso-client', 

'/usr/local/lib/python2.7/dist-packages/IPython/extensions', 

'/home/arun/.ipython']