Hello,

I am having some trouble in working out the distance of each node from the starting node in my Dijkstra Algorithm code. Here is my code with the section i'm stuck on in bold:

```
infinity = 1000000
invalid_node = -1
startNode = 0
class Node:
distFromSource = infinity
previous = invalid_node
visited = False
def populateNodeTable():
nodeTable = []
index =0
f = open('route.txt', 'r')
for line in f:
node = map(int, line.split(','))
nodeTable.append(Node())
print nodeTable[index].previous
print nodeTable[index].distFromSource
index +=1
nodeTable[startNode].distFromSource = 0
return nodeTable
def tentativeDistance(currentNode, nodeTable):
nearestNeighbour = []
for currentNode in nodeTable:
[B]# if Node[currentNode].distFromSource +
currentDistance = startNode + currentNode
# currentDistance = currentNode.distFromSource + nodeTable.currentNode [/B]
currentNode.previous = currentNode
currentNode.length = currentDistance
currentNode.visited = True
currentNode +=1
nearestNeighbour.append(currentNode)
print nearestNeighbour
return nearestNeighbour
currentNode = startNode
if __name__ == "__main__":
populateNodeTable()
tentativeDistance(currentNode,populateNodeTable())
```

I've no idea on where I am going wrong, i've tried a few things now but nothing seems to work