Can't figure out 'instance has no attribute' error

[varun7rs at gmail.com]

On Sunday, 18 May 2014 01:56:42 UTC+2, varu... at gmail.com  wrote:
> Hello Friends,
> 
> 
> 
> I am working on this code but I kind of get the same error over and over again. Could any of you help me fix this part of the error?
> 
> 
> 
> File RW1:
> 
> class PHY_NETWORK:
> 
>     def __init__(self, nodes, edges):
> 
>         self.nodes = nodes
> 
>         self.edges = edges  
> 
>         
> 
> 	def addNode(self, node):
> 
> 		self.nodes.append( node )
> 
> 
> 
> 	def addEdge(self, edge):
> 
> 		self.edges.append( edge )
> 
> 
> 
> File RW3:
> 
> def createnetwork(graph):
> 
> 
> 
> 	
> 
> 	doc = parse( args.paramFile )
> 
> 	noderef = []	
> 
> 	num = 0
> 
> 	nodelist = doc.getElementsByTagName("node")
> 
> 	for node in nodelist:
> 
> 		noderef.append(node.getAttribute("id"))
> 
> 		proc = random.randint(3500, 5000)
> 
> 		stor = random.randint(7200, 8200)
> 
> 		switch = random.randint(7000, 10000)
> 
> 		num = num + 1
> 
> 		totaldemands = random.randint(1, 5)
> 
> 		graph.addNode(PHY_NODES( node.getAttribute("id"), int(num), float(xCoordinates.firstChild.data), float(yCoordinates.firstChild.data), float(proc), float(stor), float(switch), int(totaldemands)))
> 
> 		    
> 
> 		    
> 
> 	linkid = 0    
> 
> 	linklist = doc.getElementsByTagName("link")    
> 
> 	for link in linklist :
> 
> 		linkid = linkid + 1
> 
> 		Source = link.getElementsByTagName("source") [0]
> 
> 		Destination = link.getElementsByTagName("target") [0]
> 
> 		Capacity = link.getElementsByTagName("capacity") [0]
> 
> 		SourceID = noderef.index(Source.firstChild.data) + 1
> 
> 		DestinationID = noderef.index(Destination.firstChild.data) + 1
> 
> 		graph.addEdge( PHY_LINKS( linkid, Source.firstChild.data, Destination.firstChild.data, DestinationID, SourceID, float(Capacity.firstChild.data) ))
> 
> 
> 
> 
> 
> 	global args
> 
> 	args = parser.parse_args()
> 
> 
> 
> 	samplenetwork = PHY_NETWORK([], [])
> 
> 	for i in range(1, 100):
> 
> 		createnetwork(samplenetwork)
> 
> 		exportXmlFile(samplenetwork, args.output, 'a' )		
> 
> 	
> 
>    
> 
> if __name__ == "__main__":
> 
>   main(sys.argv[1:])
> 
> 
> 
> 
> 
> srva at hades:~$ python RW3.py --output topology.xml --xml germany50.xml
> 
> Traceback (most recent call last):
> 
>   File "RW3.py", line 157, in <module>
> 
>     main(sys.argv[1:])
> 
>   File "RW3.py", line 152, in main
> 
>     createnetwork(samplenetwork)
> 
>   File "RW3.py", line 31, in createnetwork
> 
>     graph.addNode(PHY_NODES( node.getAttribute("id"), int(num), float(xCoordinates.firstChild.data), float(yCoordinates.firstChild.data), float(proc), float(stor), float(switch), int(totaldemands)))
> 
> AttributeError: PHY_NETWORK instance has no attribute 'addNode'
> 
> 
> 
> 
> 
> The error that it give back is as above. I have the classes defined in RW1 file and I am importing the classes onto RW3 file and yet, It doesn't seem to work. I really am in need of your valuable suggestions. Thank You

Thank you very much Ned, Rodri and Gary. I changed the settings of gedit text editor as mentioned in the Zed Shaw tutorial. I think this is causing me the problem. I'll follow your advice.