On 18/09/15 16:41, marcus lütolf wrote:
s = ['ab','ac','bc','ad','ae','de'] for startlist in itertools.combinations(s, 3):
How can I concatenate the 20 lists in oder to get one count for each of the items in s , for example 10 for 'ab'?
If I understand you correctly, something like this: >>> counts = {'ab':0,'ac':0,'bc':0,'ad':0,'ae':0,'de':0} >>> for combo in it.combinations(counts.keys(),3): ... for pair in combo: ... counts[pair] += 1 ... >>> counts {'ac': 10, 'ab': 10, 'ae': 10, 'ad': 10, 'bc': 10, 'de': 10} Is that what you want? -- 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