前面我们讲解了鸡尾酒排序,今天我们来用代码实现下
#!/usr/bin/python
# -*- coding: utf-8 -*-
#鸡尾酒排序
def _cocktail_sort(the_list):
the_len = len(the_list)
if the_len <2:#0和1
print "无需排序"
return the_list
else:
while 1:
flag = False
for i in range(the_len-1):
if the_list[i] > the_list[i+1]:
the_list[i], the_list[i+1] = the_list[i+1], the_list[i]
print the_list
j = the_len-1
while j > 0:
if the_list[j-1] > the_list[j]:
the_list[j], the_list[j-1] = the_list[j-1], the_list[j]
flag = True
j -= 1
print the_list
if flag == False:
break
return the_list
if __name__ == '__main__':
the_list = [6, 4, 5, 1, 8, 7, 2, 3]
print "原始的列表是:" + str(the_list)
print "鸡尾酒排序之后的列表是:" + str(_cocktail_sort(the_list))
我们运行下,效果如下
原始的列表是:[6, 4, 5, 1, 8, 7, 2, 3]
[4, 6, 5, 1, 8, 7, 2, 3]
[4, 5, 6, 1, 8, 7, 2, 3]
[4, 5, 1, 6, 8, 7, 2, 3]
[4, 5, 1, 6, 8, 7, 2, 3]
[4, 5, 1, 6, 7, 8, 2, 3]
[4, 5, 1, 6, 7, 2, 8, 3]
[4, 5, 1, 6, 7, 2, 3, 8]
[4, 5, 1, 6, 7, 2, 3, 8]
[4, 5, 1, 6, 7, 2, 3, 8]
[4, 5, 1, 6, 2, 7, 3, 8]
[4, 5, 1, 2, 6, 7, 3, 8]
[4, 5, 1, 2, 6, 7, 3, 8]
[4, 1, 5, 2, 6, 7, 3, 8]
[1, 4, 5, 2, 6, 7, 3, 8]
[1, 4, 5, 2, 6, 7, 3, 8]
[1, 4, 5, 2, 6, 7, 3, 8]
[1, 4, 2, 5, 6, 7, 3, 8]
[1, 4, 2, 5, 6, 7, 3, 8]
[1, 4, 2, 5, 6, 7, 3, 8]
[1, 4, 2, 5, 6, 3, 7, 8]
[1, 4, 2, 5, 6, 3, 7, 8]
[1, 4, 2, 5, 6, 3, 7, 8]
[1, 4, 2, 5, 6, 3, 7, 8]
[1, 4, 2, 5, 3, 6, 7, 8]
[1, 4, 2, 3, 5, 6, 7, 8]
[1, 4, 2, 3, 5, 6, 7, 8]
[1, 2, 4, 3, 5, 6, 7, 8]
[1, 2, 4, 3, 5, 6, 7, 8]
[1, 2, 4, 3, 5, 6, 7, 8]
[1, 2, 4, 3, 5, 6, 7, 8]
[1, 2, 3, 4, 5, 6, 7, 8]
[1, 2, 3, 4, 5, 6, 7, 8]
[1, 2, 3, 4, 5, 6, 7, 8]
[1, 2, 3, 4, 5, 6, 7, 8]
[1, 2, 3, 4, 5, 6, 7, 8]
[1, 2, 3, 4, 5, 6, 7, 8]
[1, 2, 3, 4, 5, 6, 7, 8]
[1, 2, 3, 4, 5, 6, 7, 8]
[1, 2, 3, 4, 5, 6, 7, 8]
[1, 2, 3, 4, 5, 6, 7, 8]
[1, 2, 3, 4, 5, 6, 7, 8]
[1, 2, 3, 4, 5, 6, 7, 8]
鸡尾酒排序之后的列表是:[1, 2, 3, 4, 5, 6, 7, 8]
符合预期