#！/usr/bin/env python # -*- coding:utf-8 -*- def mp_sort(numbers): for i in range(len(numbers)-1): for j in range(len(numbers) - i -1): if numbers[j] > numbers[j+1]: numbers[j],numbers[j+1] = numbers[j+1],numbers[j] return numbers print mp_sort([2,34,55,43,2,3,56,67,45])
#常见的冒泡排序法，如[7,2,5,1,4]
当 i = 0 ，进入第二个for , 循环次数5-0-1=4次，当j = 0 [2,7,5,1,4]
j = 1 [2,5,7,1,4]
j = 2 [2,5,1,7,4]
j = 3 [2,5,1,4,7]
当 i = 1 ，进入第二个for , 循环次数5-1-1=3次, 当j = 0 [2,5,1,4,7]
j = 1 [2,1,5,4,7]
j = 2 [2,1,4,5,7]
当 i = 2 ，进入第二个for , 循环次数5-2-1=2次, 当j = 0 [1,2,4,5,7]
j = 1 [1,2,4,5,7]
当 i = 3 ，进入第二个for , 循环次数5-3-1=1次, 当j = 0 [1,2,4,5,7]
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