On 20/08/15 09:51, Srihari Vijayaraghavan wrote:
In general I agree, but this is what the os.walk() document states: "... When topdown is True, the caller can modify the dirnames list in-place (perhaps using del or slice assignment)..."
That's true so far as the os.walk call goes. That is, altering dirs does not have any nagative impact on the subsequent iterations of os.walk. So even if you delete items from dirs os.walk will continue to iterate over those deleted directories in subsequent calls to os.walk() But altering dirs within the current iteration does affect dirs within that iteration, just like any other collection. So your for loop inside the os.walk loop is affected by the deletions even if the outer os.walk loop is not. -- Alan G Author of the Learn to Program web site http://www.alan-g.me.uk/ http://www.amazon.com/author/alan_gauld Follow my photo-blog on Flickr at: http://www.flickr.com/photos/alangauldphotos _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
