def quick_sort(list): little = [] pivotList = [] large = [] # 递归出口 if len(list) <= 1: return list else: # 将第一个值做为基准 pivot = list[0] for i in list: # 将比基准小的值放到less数列 if i < pivot: little.append(i) # 将比基准大的值放到more数列 elif i > pivot: large.append(i) # 将和基准相同的值保存在基准数列 else: pivotList.append(i) # 对less数列和more数列继续进行快速排序 little = quick_sort(little) large = quick_sort(large) return little + pivotList + large
#!/usr/bin/env python #coding:utf-8 ''' file:python-8sort.py date:9/1/17 9:03 AM author:lockey email:lockey@123测试数据 desc:python实现八大排序算法 ''' lst = [65,568,9,23,4,34,65,8,6,9] def quick_sort(list): if len(list) <= 1: return list else: pivot = list[0] return quick_sort([x for x in list[1:] if x < pivot]) + [pivot] + quick_sort([x for x in list[1:] if x >= pivot])
# -*- coding: UTF-8 -*- ''' Created on 2017年9月2日 Running environment:win7.x86_64 eclipse python3 @author: Lockey ''' lst = [65,568,9,23,4,34,65,8,6,9] def adjust_heap(lists, i, size):# 调整堆 lchild = 2 * i + 1;rchild = 2 * i + 2 max = i if i < size / 2: if lchild < size and lists[lchild] > lists[max]: max = lchild if rchild < size and lists[rchild] > lists[max]: max = rchild if max != i: lists[max], lists[i] = lists[i], lists[max] adjust_heap(lists, max, size) def build_heap(lists, size):# 创建堆 halfsize = int(size/2) for i in range(0, halfsize)[::-1]: adjust_heap(lists, i, size) def heap_sort(lists):# 堆排序 size = len(lists) build_heap(lists, size) for i in range(0, size)[::-1]: lists[0], lists[i] = lists[i], lists[0] adjust_heap(lists, 0, i) print(lists)
# -*- coding: UTF-8 -*- ''' Created on 2017年9月2日 Running environment:win7.x86_64 eclipse python3 @author: Lockey ''' lst = [65,568,9,23,4,34,65,8,6,9] def merge(left, right): i, j = 0, 0 result = [] while i < len(left) and j < len(right): if left[i] <= right[j]: result.append(left[i]) i += 1 else: result.append(right[j]) j += 1 result += left[i:] result += right[j:] print(result) return result def merge_sort(lists):# 归并排序 if len(lists) <= 1: return lists num = int(len(lists) / 2) left = merge_sort(lists[:num]) right = merge_sort(lists[num:]) return merge(left, right)
# -*- coding: UTF-8 -*- ''' Created on 2017年9月2日 Running environment:win7.x86_64 eclipse python3 @author: Lockey ''' import math lst = [65,56,9,23,84,34,8,6,9,54,11] #因为列表数据范围在100以内,所以将使用十个桶来进行排序 def radix_sort(lists, radix=10): k = int(math.ceil(math.log(max(lists), radix))) bucket = [[] for i in range(radix)] for i in range(1, k+1): for j in lists: gg = int(j/(radix**(i-1))) % (radix**i) bucket[gg].append(j) del lists[:] for z in bucket: lists += z del z[:] print(lists) return lists
程序运行测试结果:
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