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Graph module for Dijkstra
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class Vertex: | |
def __init__(self, key): | |
self.id = key | |
self.connectedTo = {} | |
self.color = 'white' | |
self.dist = sys.maxsize | |
self.pred = None | |
self.disc = 0 | |
self.fin = 0 | |
def addNeighbor(self, nbr, weight=0): | |
self.connectedTo[nbr] = weight | |
def setColor(self, color): | |
self.color = color | |
def setDistance(self, d): | |
self.dist = d | |
def setPred(self, p): | |
self.pred = p | |
def setDiscovery(self, dtime): | |
self.disc = dtime | |
def setFinish(self, ftime): | |
self.fin = ftime | |
def getFinish(self): | |
return self.fin | |
def getDiscovery(self): | |
return self.disc | |
def getPred(self): | |
return self.pred | |
def getDistance(self): | |
return self.dist | |
def getColor(self): | |
return self.color | |
def getConnections(self): | |
return self.connectedTo.keys() | |
def getWeight(self, nbr): | |
return self.connectedTo[nbr] | |
def __str__(self): | |
return str(self.id) + ' connectedTo: ' + str([x.id for x in self.connectedTo]) | |
def getId(self): | |
return self.id | |
class Graph: | |
def __init__(self): | |
self.vertList = {} | |
self.numVertices = 0 | |
def addVertex(self,key): | |
self.numVertices = self.numVertices + 1 | |
newVertex = Vertex(key) | |
self.vertList[key] = newVertex | |
return newVertex | |
def getVertex(self,n): | |
if n in self.vertList: | |
return self.vertList[n] | |
else: | |
return None | |
def __contains__(self,n): | |
return n in self.vertList | |
def addEdge(self,f,t,cost=0): | |
if f not in self.vertList: | |
nv = self.addVertex(f) | |
if t not in self.vertList: | |
nv = self.addVertex(t) | |
self.vertList[f].addNeighbor(self.vertList[t], cost) | |
def getVertices(self): | |
return self.vertList.keys() | |
def __iter__(self): | |
return iter(self.vertList.values()) |
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