python

Python 算法大全

2019-04-28  本文已影响0人  ___n

这个库涵盖了多种算法和数据结构的介绍,比如:

image

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

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=',')

感兴趣的童鞋,请收藏:

https://github.com/TheAlgorithms/Python

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