错误: name 'shortest_path_count' is not defined
时间: 2023-09-13 17:05:28 浏览: 40
It seems like you are encountering a NameError in your code. This error occurs when you try to use a variable or function that is not defined in the current scope.
In this case, the error message indicates that the function `shortest_path_count` is not defined. This means that you either have not defined this function in your code or you have not imported it from another module.
To fix this error, you need to define the `shortest_path_count` function before using it in the `all_pairs_shortest_path_count` function. Alternatively, if you have defined the function in another module, you can import it using the `import` statement.
Here is an example implementation of the `shortest_path_count` function that you can use:
```
def shortest_path_count(graph, start, end):
queue = deque([(start, 1)])
count = 0
while queue:
node, dist = queue.popleft()
if node == end:
count += 1
else:
for neighbor in graph[node]:
if neighbor not in visited:
queue.append((neighbor, dist + 1))
return count
```
You can add this function to your code and call it in the `all_pairs_shortest_path_count` function to fix the error.