基于python的公交换乘系统源码+示例图片（求解最短路径，最少换乘问题）.zip

import MapCreater import OneRoadMapCreater import copy import random import operator import InputCtrl def MinTransferDijkstra(StartSite, EndSite): if StartSite == EndSite: return 0, [], [] if StartSite not in OneRoadMapCreater.SiteDic: print("起始点不存在") return -1, [], [] if EndSite not in OneRoadMapCreater.SiteDic: print("终止点不存在") return -1, [], [] StartSiteIndex = OneRoadMapCreater.SiteDic[StartSite] EndSiteIndex = OneRoadMapCreater.SiteDic[EndSite] DijkstraArr = copy.deepcopy(OneRoadMapCreater.HeadSiteArr) minlen = float("inf") BusIdMaps = [] RouteMaps = [] is_continue = 10 while is_continue: RouteMap = [[float("inf") for col in range(500)] for row in range(500)] # 存储最短路径，之后倒序查找可以回溯到起始点 valuequeue = [] #权值队列，存储pair(index, value) BusIdMap = [[[] for col in range(500)] for row in range(500)] #保存车站路径，之后倒序查找可以回溯到起始点 for i, site in enumerate(DijkstraArr[StartSiteIndex]): if site < 10000: pair = [i, site, StartSiteIndex] valuequeue.append(pair) DijkstraArr[i][StartSiteIndex] = float("inf") #无向边，从正向走过去就不要走回来了 else: continue #如果不连通（权值是无穷大）则跳过 #初步找到了所有和StartSite相连的点，建立邻接路径矩阵，每次保存最短路径，之后可以倒序输出。 while(len(valuequeue) > 0):#非空，先将队列排序，按照value递增排序，每次弹出队列头。 sorted(valuequeue, key=lambda t: t[1]) #按照value对valuequeue中的pair进行排序 #valuequeue中最小值可能不止一个，随机返回一个最小值 minline = [] min_in_minline = valuequeue[0][1] #valuequeue头上的一定是最小的 for tmin in valuequeue: if tmin[1] == min_in_minline: minline.append(tmin) else: break random.shuffle(minline) [tindex, tvalue, tparent] = valuequeue.pop(valuequeue.index(minline.pop(0))) #释放队列头，即权值最小的节点 RouteMap[tparent][tindex] = tvalue #这一条路径已经确定，记录下来 BusIdMap[tparent][tindex].extend(OneRoadMapCreater.BusIdArr[tparent][tindex]) #保存路线站点 #DijkstraArr[tparent][tindex] = float("inf") if tindex == EndSiteIndex: #这样就找到了 #return tvalue, RouteMap, BusIdMap if minlen >= tvalue: minlen = tvalue # for eachroute in RouteMaps: # if doublelist_equal(eachroute, RouteMap): # break # else: RouteMaps.append(RouteMap) BusIdMaps.append(BusIdMap) is_continue -= 1 break else: is_continue = 0 return minlen, RouteMaps, BusIdMaps else: #这样就还没找到 temparr = [] #暂时保存新扩展的节点 for i, tsite in enumerate(DijkstraArr[tindex]): if tsite < 10000: tpair = [i, tsite + tvalue, tindex] #因为是在tindex对应的节点上扩展的，所以权值应该是tindex的权值+本身的权值 temparr.append(tpair) DijkstraArr[i][tindex] = float("inf") while(len(temparr) > 0): #用新扩展的节点更新dijkstra邻接矩阵路径代价 [newindex, newvalue, newparent] = temparr.pop() for one in valuequeue: if newindex == one[0]: #如果扩展到了已经存在的节点，就更新值 if one[1] > newvalue: one[1] = newvalue break else: #如果是新扩展的，就添加进入队列中 valuequeue.append([newindex, newvalue, newparent]) else: #print("没有路径") print(minlen) return minlen, RouteMaps, BusIdMaps return minlen, RouteMaps, BusIdMaps def MinDistanceDijkstra(StartSite, EndSite): if StartSite == EndSite: return 0, [], [] if StartSite not in MapCreater.SiteDic: print("起始点不存在") return -1, [], [] if EndSite not in MapCreater.SiteDic: print("终止点不存在") return -2, [], [] StartSiteIndex = MapCreater.SiteDic[StartSite] EndSiteIndex = MapCreater.SiteDic[EndSite] DijkstraArr = copy.deepcopy(MapCreater.HeadSiteArr) minlen = float("inf") BusIdMaps = [] RouteMaps = [] is_continue = 10 while is_continue: RouteMap = [[float("inf") for col in range(500)] for row in range(500)] # 存储最短路径，之后倒序查找可以回溯到起始点 valuequeue = [] #权值队列，存储pair(index, value) BusIdMap = [[[] for col in range(500)] for row in range(500)] #保存车站路径，之后倒序查找可以回溯到起始点 for i, site in enumerate(DijkstraArr[StartSiteIndex]): if site < 10000: pair = [i, site, StartSiteIndex] valuequeue.append(pair) DijkstraArr[i][StartSiteIndex] = float("inf") #无向边，从正向走过去就不要走回来了 else: continue #如果不连通（权值是无穷大）则跳过 #初步找到了所有和StartSite相连的点，建立邻接路径矩阵，每次保存最短路径，之后可以倒序输出。 while(len(valuequeue) > 0):#非空，先将队列排序，按照value递增排序，每次弹出队列头。 sorted(valuequeue, key=lambda t: t[1]) #按照value对valuequeue中的pair进行排序 #valuequeue中最小值可能不止一个，随机返回一个最小值 minline = [] min_in_minline = valuequeue[0][1] #valuequeue头上的一定是最小的 for tmin in valuequeue: if tmin[1] == min_in_minline: minline.append(tmin) else: break random.shuffle(minline) [tindex, tvalue, tparent] = valuequeue.pop(valuequeue.index(minline.pop(0))) #释放队列头，即权值最小的节点 RouteMap[tparent][tindex] = tvalue #这一条路径已经确定，记录下来 BusIdMap[tparent][tindex].extend(MapCreater.BusIdArr[tparent][tindex]) #保存路线站点 #DijkstraArr[tparent][tindex] = float("inf") if tindex == EndSiteIndex: #这样就找到了 #return tvalue, RouteMap, BusIdMap if minlen >= tvalue: minlen = tvalue # for eachroute in RouteMaps: # if doublelist_equal(eachroute, RouteMap): # break # else: RouteMaps.append(RouteMap) BusIdMaps.append(BusIdMap) is_continue -= 1 break else: is_continue = 0 return minlen, RouteMaps, BusIdMaps else: #这样就还没找到 temparr = [] #暂时保存新扩展的节点 for i, tsite in enumerate(DijkstraArr[tindex]): if tsite < 10000: tpair = [i, tsite + tvalue, tindex] #因为是在tindex对应的节点上扩展的，所以权值应该是tindex的权值+本身的权值