扫雷：Python 错误。 AttributeError: 类型对象没有属性

Question

I am quite new to coding and is having trouble with accessing the attributes of objects inside of another object. I have tried explicitly creating a method for returning the attribut to no awail. i cant seem to find a good explination online.

The code that i am working on have the ultimate goal of simulating a game of minesweeper. To do this i have created a class named minefield.

class Minefield:
    def __init__(self, height, width, bombs):
        self.height = height
        self.width = width
        self.bombs = bombs
        self.flagged_amount = 0
        self.minefield = []
        self.setup_minefield()

    def setup_minefield(self):  # setup for the minefield
        for x in range(self.height):
            self.minefield.append([])
            for y in range(self.width):
                self.minefield[x].append(Cell) 

As well as a class named Cell

class Cell:
   def __init__(self):  # setup for new cell
        self.revealed = False
        self.bomb = False
        self.flag = False
        self.nearby_bombs = 0

Now, the issue that im having is that when i try to access an attribute of a cell in the minefield i get the error: AttributeError: type object 'Cell' has no attribute 'flag'

The code that im trying to run right now (resulting in the error) using theese classes is quite simple (see below) but i will need to use these attributes for many planned functions later in the program.

my_minefield = Minefield(5, 5, 2)
    if my_minefield.minefield[1][1].flag:
        print ("yay")

I am not sure why this isnt working and would greatly appreciate any help in understanding the issue. Thanks!

Answer 1

Here:

self.minefield[x].append(Cell) 

You're appending the Cell class, not an instance of it. You have to instanciate the class by calling it:

self.minefield[x].append(Cell())