To see where the system python is installed :

 $ python
 >>> import sys
 >>> sys.path

 The default place to put local modules :
 >>> sys.prefix
 '/usr'

 $ cd /usr/lib/python2.4/site-packages/
 $ ls
 See lots of 'em

 $ cd /usr/local/lib/python2.4/site-packages/
 Nothing by default

 To install the authors package site-wide :
 $ su
 $ cd /var/www/cs/htdocs/courses/fall2006/python/book_code/ppitcs_code
 $ cp graphics.py /usr/local/lib/python2.4/site-packages/

 Check :
 # start X11 on mac
 laptop$ ssh -X cs
 cs$ cd ~
 cs$ python
 >>> import graphics
 >>> win = graphics.GraphWin()
 # should see a window pop up

 For students: just make sure the graphics.py file is in
 the same directory as your command prompt.  The file
 is on the book CD, or you can get it from book_code/ppitcs_code/graphics.py
 in the course directory