[Tutor] Tk canvas question

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   I am writing a resource manager like program !
the files of directory is display on canvas and taged.
the tag and file name is keep in a dictionary!
The tag is a increaseing number from 1,so I build the 
dictionary like (1:file1,2:file2,......).
While geting into another directory,I try to remove all 
object and tags on the canvas so that the tags would be 
count form 1 again.But I found out the tag number is 
increasing, not recount form 1. My dictionary can be 
organize that simple.
   I want to know is there a way to get the tag of canvas 
recount form 1 again? or even more simple ,get the filename 
I had wrote in canvas directly? 
   

¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡winglion1 at 163.com
¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡2005-08-23