[Tutor] Re: Python Imaging Library

[Leighton Pritchard]

Hi Henry,

>I downloaded the PIL version 1.1.3 that can be used with
>Python version 2.2. I do have three questions however.
>1) When I extract the files, in which directory should I extract
>them to?
>2) Once that is done, how do I tie them into the Python 2.2
>program, so that when I use import Image, etc. within a Python
>program to bring in the PIL library routines, Python will know
>where the PIL library is located?

On Windows I have Python's top directory in 
F:\Applications\Python\python22, and the PIL sits in 
F:\Applications\Python\python22\PIL (i.e. this is the directory which has 
all the .py files in, including __init__.py).

I have a plain text file called PIL.pth in Python's top directory, whose 
sole contents are "PIL" (without the quotation marks). This allows me to 
use 'import Image' to bring in the PIL itself.

On Linux, my python libraries are in /usr/local/lib/python2.2 (if you're 
using Linux, yours might not be), and the PIL files are in 
/usr/local/lib/python2.2/site-packages/PIL.  Again, there is a PIL.pth file 
in /usr/local/lib/python.2./site-packages containing only "PIL" without the 
quotes. This lets me use 'import _imaging' and 'import image' to bring in 
the PIL.

>3) Also, am I correct in saying that if I want to open a graphic
>file and plot it on a canvas, I must use PIL? Or would I have
>been able to do that with what already comes with the Python
>2.2 download?

I think that there's a PhotoImage object in Tkinter that would allow you to 
do that without PIL, but I'm happy to bow to the more experienced users on 
the list over that...


-- 
Dr Leighton Pritchard AMRSC
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Institute of Biological Sciences
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