无休止的while循环混乱
无休止的while循环混乱
提问于 2013-03-28 12:40:46
所以我试图在一个9x9的网格上规划一条路径，所以boardSize是9。while循环应该停止路径列表的长度是81或更多，那么当生物在7,5，目标在5,2，海拔为0时，为什么它可以达到3531的长度？是我的while循环出错了，还是你觉得它可能在别的地方？
def planPath(self, creature, goal, board):
print("in the path")
path = [board[creature.x][creature.y]]
while goal not in path or len(path) < self.boardSize ** 2:
print("path length")
print(len(path))
nextPossible = {}
for neighbor in path[-1].neighbors:
if type(neighbor) is not Land.Water:
nextPossible[neighbor] = abs(neighbor.location[0] - goal.location[0]) + abs(neighbor.location[1] - goal.location[1]) + abs(neighbor.elevation - goal.elevation)
path.append(min(nextPossible, key=nextPossible.get))
return path回答 1
Stack Overflow用户
回答已采纳
发布于 2013-03-28 15:32:55
您希望在路径长度达到棋盘上的正方形数量时结束while循环-在while循环中使用and而不是or，它将在以下两个表达式之一时结束：
goal not in path或者这个表达式：
len(path) < self.boardSize ** 2计算结果为False。使用or，只要其中一个表达式为真，循环就会继续运行。因此，您的修复代码将是：
def planPath(self, creature, goal, board):
print("in the path")
path = [board[creature.x][creature.y]]
while goal not in path and len(path) < self.boardSize ** 2:
print("path length")
print(len(path))
nextPossible = {}
for neighbor in path[-1].neighbors:
if type(neighbor) is not Land.Water:
nextPossible[neighbor] = abs(neighbor.location[0] - goal.location[0]) + abs(neighbor.location[1] - goal.location[1]) + abs(neighbor.elevation - goal.elevation)
path.append(min(nextPossible, key=nextPossible.get))
return path页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/15674410
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