On 03/09/16 04:25, monik...@netzero.net wrote: > Is this what you mean? > a = 5 > b = a > a = b
No, you are confusing variable names with objects. Here you only have one object - the number 5. For a cycle you need at least 2 objects and those objects must be able to reference another object. In practice that means a collection or an instance of a class. a = [] b = [a] a.append(b) The two lists are now cyclically referring to each other. We can now delete the names a and b and the two list objects will continue to exist in memory even though no variables refer to them. This is where the second garbage collector comes into play, it can recognise the link between the lists and the fact that no variable refers to them. -- 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
