--- id: 6557910b0ebaeebc18209e90 title: Step 46 challengeType: 20 dashedName: step-46 --- # --description-- Now remove `pass` and assign `paths[current]` to `paths[node]`. # --hints-- You should delete `pass` and assign `paths[current]` to `paths[node]`. ```js ({ test: () => { const shortest = __helpers.python.getDef(code, "shortest_path"); const {function_body} = shortest; assert(function_body.match(/^(\s*)if.*:.*^\1(\s{4})if\s+paths\s*\[\s*node\s*\]\s*\[\s*-\s*1\s*\]\s*==\s*node\s*:\s*^\1\2\2paths\s*\[\s*node\s*\]\s*=\s*paths\s*\[\s*current\s*\]/ms)); } }) ``` # --seed-- ## --seed-contents-- ```py 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) --fcc-editable-region-- while unvisited: current = min(unvisited, key=distances.get) for node, distance in graph[current]: if distance + distances[current] < distances[node]: distances[node] = distance + distances[current] if paths[node][-1] == node: pass --fcc-editable-region-- print(f'Unvisited: {unvisited}\nDistances: {distances}\nPaths: {paths}') #shortest_path(my_graph, 'A') ```