[Tutor] padding frames

[Christopher Spears]

Hmmm...

zfill is a great tool, but how would I go about
isolating the part of file's name (DSCN-2.JPG) that I
would need?  My first idea is to somehow get the files
(or their names anyway) into a list as strings:

x = ['DSCN-2.JPG', 'DSCN-11.jpg', 'DSCN-101.JPG',
'DSCN-2302.JPG']

Then somehow strip off the parts I don't need and run
zfill on the numbers:

>>>'DSCN-' + x[0][5].zfill(4) + '.JPG'

Problem 1:
How do I go about putting the files into a list?  Do I
even need to put the files into a list?  After all, I
just want to change their names.  Do the files need to
be opened?

Problem 2:
How do I isolate the portion of the file name that I
need?

Any thoughts, strategies?

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