Python数据结构之图的应用示例

本文实例讲述了Python数据结构之图的应用。分享给大家供大家参考，具体如下：一、图的结

本文实例讲述了Python数据结构之图的应用。分享给大家供大家参考，具体如下：

一、图的结构

二、代码

# -*- coding:utf-8 -*-
#! python3
def searchGraph(graph,start,end):
 results =[]
 generatePath(graph,[start],end,results)
 results.sort(key =lambda x:len(x))
 return results
def generatePath(graph,path,end,results):
 state = path[-1]
 if state == end:
 results.append(path)
 else:
 for arc in graph[state]:
 if arc not in path:
 generatePath(graph,path +[arc],end ,results)
if __name__ =='__main__':
 Graph={'A':['B','C','D'],
 'B':['E'],
 'C':['D','F'],
 'D':['B','E','G'],
 'E':[],
 'F':['D','G'],
 'G':['E']}
 r = searchGraph(Graph,'A','E')
 print("******************")
 print(' path A to E')
 print("******************")
 for i in r:
 print(i)

三、运行结果

******************   path A to E ****************** ['A', 'B', 'E'] ['A', 'D', 'E'] ['A', 'C', 'D', 'E'] ['A', 'D', 'B', 'E'] ['A', 'D', 'G', 'E'] ['A', 'C', 'D', 'B', 'E'] ['A', 'C', 'D', 'G', 'E'] ['A', 'C', 'F', 'D', 'E'] ['A', 'C', 'F', 'G', 'E'] ['A', 'C', 'F', 'D', 'B', 'E'] ['A', 'C', 'F', 'D', 'G', 'E']

运行效果图如下：