Tell us what’s happening:
I get the error that I should have two iterating variables in the for loop, but I believe I already do.
Your code so far
my_graph = {
'A': [('B', 3), ('D', 1)],
'B': [('A', 3), ('C', 4)],
'C': [('B', 4), ('D', 7)],
'D': [('A', 1), ('C', 7)]
}
def shortest_path(graph, start):
unvisited = list(graph)
distances = {node: 0 if node == start else float('inf') for node in graph}
paths = {node: [] for node in graph}
paths[start].append(start)
/* User Editable Region */
while unvisited:
current = min(unvisited, key=distances.get)
for i and a in graph[current]:
pass
/* User Editable Region */
print(f'Unvisited: {unvisited}\nDistances: {distances}\nPaths: {paths}')
#shortest_path(my_graph, 'A')
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Challenge Information:
Learn Algorithm Design by Building a Shortest Path Algorithm - Step 37