不能打印自制矩陣的模塊之外

Question

我已經在我的項目2個模塊：

1- Ant.py

from threading import Thread 
from Ant_farm import Ant_farm 

ant_farm = Ant_farm(20, 20) 

class Ant(Thread): 
    def __init__(self, x, y): 
     global ant_farm 

     Thread.__init__(self) 
     self.x = x 
     self.y = y 
     ant_farm.matrix[self.x][self.y] = True # At this point the arguments has initialized? 


    def move(self, x, y): 
     ant_farm.matrix[self.x][self.y] = False 
     self.x = x 
     self.y = y 
     ant_farm.matrix[self.x][self.y] = True # At this point the value has changed? 

    def run(self): 
     while True: 
      ant_farm.move_ant(self) 

t = Ant(0, 0) 
print(ant_farm[0][0]) 
t.move(1, 0) 

2- Ant_farm.py

from threading import Condition 

def matrix(x, y): 
    return [[False for j in range(y)] for i in range(x)] 

class Ant_farm(): 
    def __init__(self, x, y): 
     self.c = Condition() # I don't know if I have to put "self" before 
     self.matrix = matrix(x, y) 

    def move_ant(self, ant): 
     new_pos = {0: tuple(x0, y0 - 1), 
        1: tuple(x0 + 1, y0), 
        2: tuple(x0, y0 + 1), 
        3: tuple(x0 - 1, y0)} 
     x0, y0 = ant.x, ant.y 
     x1, y1 = new_pos[random.randrange(0, 4)] 
     with self.c: 
      try: 
       while self.matrix[x1][y1]: 
        self.c.wait() 
       self.matrix[x0][y0] = False 
       ant.move(x1, y1) 
       # It's not end and I have to review 

      except Exception: # Wich exceptions can appear? 
       pass 

    def __str__(self): 
     pass 

兩者都省略了評論。

當我執行Ant模塊，提出了這樣的錯誤：在第27行（print(ant_farm[0][0])）

AttributeError: Ant_farm instance has no attribute '__getitem__'

。這是爲什麼？

Answer 1

如錯誤消息所示，您沒有定義什麼ant_farm[i]（功能__getitem__）。 你可能想在你的Ant_farm類是這樣的：

def __getitem__(i): 
    return self.matrix[i]