[Tutor] How Do I Put an Image on a Canvas and Display it?

[Alan Gauld]

"Wayne Watson" <sierra_mtnview at sbcglobal.net> wrote 

>>>> Image
> <class Image.Image at 0x00EA5720>
>>>> help(Image)
> Help on class Image in module Image:
> ...
> This is definitely different than the Tkimage help you showed. 

> So what's happening? 

You import your Image module as Image.
Then you import all; the names from Tkinter which includes the 
name Image. Thus the Tkinter Imahe hides the original 
imported Image.

You need to either 

import Image as im    # or some other alias

or not use from Tkinter, ie use

import Tkinter as T

Then use T.Image to refer to the Tkinter Image and im to 
refer to the imported Image module

Its all about controlling namespaces.
It is exactly because of these kinds of problems that the 
from X import * style is considered a bad idea. 
(In Tkinter it usually works because the names are pretty 
GUI specific but if, as you are doing, you mix GUI and 
graphics you get overlaps.


> How do I use the two Image classes to navigate between 
> an image that uses PIL methods and one than uses Tkinter? 

Just use the appropriate module prefix (or an alias)

See the namespaces topic in my tutor for a refresher 
on namespaces! :-)

-- 
Alan Gauld
Author of the Learn to Program web site
http://www.freenetpages.co.uk/hp/alan.gauld