[Tutor] iterating through a directory

[Alan Gauld]

On 09/09/15 15:29, richard kappler wrote:

> Still not sure how to efficiently get the script to keep moving to the next
> file in the directory though, in other words, for each iteration in the
> loop, I want it to fetch, rename and send/save the next image in line. Hope
> that brings better understanding.

Sounds like you want a circular list.

The traditional way to generate a circular
index into a list is to use the modulo (%) operator

But the itertools module gives you a better option with
the cycle function:

import itertools as it

for img in it.cycle(os.listdir(my_img_path)):
     process(img)

HTH
-- 
Alan G
Author of the Learn to Program web site
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