Python代码实现A星寻路算法

Python代码实现A星寻路算法可以使用以下代码：def astar(start, goal):
closedset = set()
openset = set([start])
came_from = {}
gscore = {start: 0}
fscore = {start: heuristic_cost_estimate(start, goal)}

while openset:
current = min(openset, key=fscore.get)

if current == goal:
return reconstruct_path(came_from, current)

openset.remove(current)
closedset.add(current)

for neighbor in get_neighbors(current):
if neighbor in closedset:
continue

tentative_gscore = gscore[current] + dist_between(current, neighbor)

if neighbor not in openset:
openset.add(neighbor)
elif tentative_gscore >= gscore[neighbor]:
continue

came_from[neighbor] = current
gscore[neighbor] = tentative_gscore
fscore[neighbor] = gscore[neighbor] + heuristic_cost_estimate(neighbor, goal)

return False