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No problem. As for the main use of cmp(), btw, afaik, it's
used to define custom sorting, as in the following: >>> import random >>> temp = [] >>> for i in range(10): temp.append((random.randint(0,100),random.randint(0,100),random.randint(0,100))) >>> temp [(16, 70, 87), (57, 80, 33), (14, 22, 2), (21, 92, 69), (40, 18, 90), (60, 78, 35), (3, 98, 7), (32, 21, 39), (15, 67, 15), (70, 95, 39)] >>> temp.sort(cmp=lambda x, y: cmp(x[0],y[0])) >>> temp [(3, 98, 7), (14, 22, 2), (15, 67, 15), (16, 70, 87), (21, 92, 69), (32, 21, 39), (40, 18, 90), (57, 80, 33), (60, 78, 35), (70, 95, 39)] >>> temp.sort(cmp=lambda x, y: cmp(x[1],y[1])) >>> temp [(40, 18, 90), (32, 21, 39), (14, 22, 2), (15, 67, 15), (16, 70, 87), (60, 78, 35), (57, 80, 33), (21, 92, 69), (70, 95, 39), (3, 98, 7)] >>> temp.sort(cmp=lambda x, y: cmp(x[2],y[2])) >>> temp [(14, 22, 2), (3, 98, 7), (15, 67, 15), (57, 80, 33), (60, 78, 35), (32, 21, 39), (70, 95, 39), (21, 92, 69), (16, 70, 87), (40, 18, 90)] or, without lambdas: >>> def sort(x,y): return cmp(x[0],y[0]) >>> def sort1(x,y): return cmp(x[1],y[1]) >>> def sort2(x,y): return cmp(x[2],y[2]) >>> temp.sort(cmp=sort) >>> temp [(3, 98, 7), (14, 22, 2), (15, 67, 15), (16, 70, 87), (21, 92, 69), (32, 21, 39), (40, 18, 90), (57, 80, 33), (60, 78, 35), (70, 95, 39)] >>> temp.sort(cmp=sort1) >>> temp [(40, 18, 90), (32, 21, 39), (14, 22, 2), (15, 67, 15), (16, 70, 87), (60, 78, 35), (57, 80, 33), (21, 92, 69), (70, 95, 39), (3, 98, 7)] >>> temp.sort(cmp=sort2) >>> temp [(14, 22, 2), (3, 98, 7), (15, 67, 15), (57, 80, 33), (60, 78, 35), (32, 21, 39), (70, 95, 39), (21, 92, 69), (16, 70, 87), (40, 18, 90)] Rinzwind wrote: Thank you! -- Email: singingxduck AT gmail DOT com AIM: singingxduck Programming Python for the fun of it. |
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