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I have a list of millions of numbers. I want to find out if the difference between each number in the ordered list is the same for the entire list. list_example = [ 0, 5, 10, 15, 20, 25, 30, 35, 40, ..etc etc etc] What's the best way to do this? My try: import collections list_example = [ 0, 5, 10, 15, 20, 25, 30, 35, 40 ] count = collections.Counter() for x,y in zip(list_example[0::],list_example[1::]): print x,y,y-x count[y-x] +=1 if len( count ) == 1: print 'Differences all the same' Result: 0 5 5 5 10 5 10 15 5 15 20 5 20 25 5 25 30 5 30 35 5 35 40 5 Differences all the same
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