4 月 27 日,github 趋势榜第 3 位是一个用 python 编码实现的算法库,star 数早已达到 26000+
链接:https://github.com/thealgorithms/python
这个库涵盖了多种算法和数据结构的介绍,比如:
- 排序算法(冒泡排序、希尔排序、插入排序、桶排序、合并排序、快速排序、堆排序、选择排序等)、
- 查找算法(线性查找、二分查找、插值查找等)
- 加密算法(凯撒加密、rsa、rot13 等)
- 机器学习
- 图
- 数字图像处理
- 动态规划
- 常见数据结构(队列、栈、链表、树等)
这个库虽然包括的种类很多,但内容其实分了 2 方面:① 算法的原理简介;② 算法的代码实现;
比如:冒泡算法的 python 实现
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from __future__ import print_function
def bubble_sort(collection):
"""pure implementation of bubble sort algorithm in python
:param collection: some mutable ordered collection with heterogeneous
comparable items inside
:return: the same collection ordered by ascending
examples:
>>> bubble_sort([0, 5, 3, 2, 2])
[0, 2, 2, 3, 5]
>>> bubble_sort([])
[]
>>> bubble_sort([-2, -5, -45])
[-45, -5, -2]
>>> bubble_sort([-23,0,6,-4,34])
[-23,-4,0,6,34]
"""
length = len (collection)
for i in range (length - 1 ):
swapped = false
for j in range (length - 1 - i):
if collection[j] > collection[j + 1 ]:
swapped = true
collection[j], collection[j + 1 ] = collection[j + 1 ], collection[j]
if not swapped: break # stop iteration if the collection is sorted.
return collection
if __name__ = = '__main__' :
try :
raw_input # python 2
except nameerror:
raw_input = input # python 3
user_input = raw_input ( 'enter numbers separated by a comma:' ).strip()
unsorted = [ int (item) for item in user_input.split( ',' )]
print ( * bubble_sort(unsorted), sep = ',' )
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感兴趣的童鞋,请收藏:
https://github.com/thealgorithms/python
好了,就给大家介绍到这里吧,希望大家喜欢!
原文链接:https://blog.51cto.com/14304496/2385783