dijkstra算法代码
时间: 2023-09-24 14:09:51 浏览: 59
以下是Dijkstra算法的Python代码实现:
```python
import sys
class Graph:
def __init__(self, vertices):
self.V = vertices
self.graph = [[0 for column in range(vertices)] for row in range(vertices)]
def printSolution(self, dist):
print("Vertex \t Distance from Source")
for node in range(self.V):
print(node, "\t\t", dist[node])
def minDistance(self, dist, sptSet):
min = sys.maxsize
min_index = 0
for v in range(self.V):
if dist[v] < min and sptSet[v] == False:
min = dist[v]
min_index = v
return min_index
def dijkstra(self, src):
dist = [sys.maxsize] * self.V
dist[src] = 0
sptSet = [False] * self.V
for cout in range(self.V):
u = self.minDistance(dist, sptSet)
sptSet[u] = True
for v in range(self.V):
if self.graph[u][v] > 0 and sptSet[v] == False and dist[v] > dist[u] + self.graph[u][v]:
dist[v] = dist[u] + self.graph[u][v]
self.printSolution(dist)
```
以上代码创建了一个Graph类,包含了Dijkstra算法的实现。在该类中,初始化了邻接矩阵图,并实现了打印解决方案、查找最小距离和Dijkstra算法。
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