无尽while循环混乱

Question

所以我想计划在9x9的网格中的路径，所以boardSize为9 while循环应停止路径列表中的81的长度以上，为什么是可能的，它可以得到一个的3531when生物长度为7,5和目标是在5,2和立面图是0？我的while循环是错误的还是你认为它可能在别处？

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 

Answer 1

你想要的while循环结束的时候，路径长度达到了广场上的板级使用and在while循环会结束时，要么这个表达式的数量，而不是or：

goal not in path 

或此表达式：

len(path) < self.boardSize ** 2 

评估为False。使用or，只要那些表现之一为真，则循环将继续运行。所以你的固定代码是：

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