python - Pythonの迷路でネズミを動かす方法

Question

私はPythonが初めてで、迷路のネズミが芽キャベツを食べようとするゲームをやろうとしています. これまでのところ、Rat クラスのすべての関数が機能しています。そして、Maze クラスの最後の関数に行き詰まっています。両方のクラスが絡み合っています。Maze クラスの move メソッドの修正に問題があります。以下の 2 つのクラスがあります。

# The visual representation of a wall.
WALL = '#'

# The visual representation of a hallway.
HALL = '.'

# The visual representation of a brussels sprout.
SPROUT = '@'

# Constants for the directions. Use these to make Rats move.

# The left direction.
LEFT = -1

# The right direction.
RIGHT = 1

# No change in direction.
NO_CHANGE = 0

# The up direction.
UP = -1

# The down direction.
DOWN = 1

# The letters for rat_1 and rat_2 in the maze.
RAT_1_CHAR = 'J'
RAT_2_CHAR = 'P'
num_sprouts_eaten = 0



class Rat:
    """ A rat caught in a maze. """

    # Write your Rat methods here.
    def __init__(Rat, symbol, row, col):
        Rat.symbol = symbol
        Rat.row = row
        Rat.col = col

        num_sprouts_eaten = 0

    def set_location(Rat, row, col):

        Rat.row = row
        Rat.col = col

    def eat_sprout(Rat):
        num_sprouts_eaten += 1        

    def __str__(Rat):
        """ (Contact) -> str

        Return a string representation of this contact.
        """
        result = ''

        result = result + '{0} '.format(Rat.symbol) + 'at '

        result = result + '('+ '{0}'.format(Rat.row) + ', '
        result = result + '{0}'.format(Rat.col) + ') ate '
        result = result + str(num_sprouts_eaten) + ' sprouts.'
        return result

class Maze: """ 2D 迷路。 """

    def __init__(Maze, content, rat_1, rat_2):
        Maze.content= content

        Maze.rat_1 = RAT_1_CHAR
        Maze.rat_2 = RAT_2_CHAR

    def is_wall(Maze, row,col):

        return (Maze.content[row][col] == '#') 

    def get_character(Maze,row, col):
        chars = ''
        if 'J' in Maze.content[row][col]:
            chars = 'J'
        elif 'P' in Maze.content[row][col]:
            chars = 'P'
        elif '#' in Maze.content[row][col]:
            chars = WALL
        else:
            chars = HALL
        return chars

    def move(Maze, Rat, hor, ver):
        num_sprouts_left = sum(x.count('@') for x in Maze.content[row][col])
        nowalls = False
        if Rat in Maze.content[row][col] and Maze.is_wall(row, col) == True:
            NO_CHANGE = Rat.set_location(row+0,col+0)

        if Rat in Maze.content[row][col] and Maze.is_wall(row, col) == False:
            UP = Rat.set_location(row,col+1)
            if UP == SPROUT:
               Rat.eat_sprout(Rat)
               num_sprouts_left -= 1
               SPROUT=HALL
        if Rat in Maze.content[row][col] and Maze.is_wall(row, col) == False:
            DOWN = Rat.set_location(row,col-1)
            if DOWN == SPROUT:
               Rat.eat_sprout(Rat)
               num_sprouts_left -= 1
               SPROUT=HALL
        if Rat in Maze.content[row][col] and Maze.is_wall(row, col) == False:
            LEFT = Rat.set_location(row-1,col)
            if LEFT == SPROUT:
               Rat.eat_sprout(Rat)
               num_sprouts_left -= 1
               SPROUT=HALL
        if Rat in Maze.content[row][col] and Maze.is_wall(row, col) == False:
            RIGHT = Rat.set_location(row+1,col)
            if RIGHT == SPROUT:
               Rat.eat_sprout(Rat)
               num_sprouts_left -= 1
               SPROUT=HALL 

            nowalls = True

        return nowalls

そのため、Maze オブジェクトを介して move メソッドを呼び出すと、エラー メッセージが表示されます。

>>> d = Maze([['#', '#', '#', '#', '#', '#', '#'], 
      ['#', '.', '.', '.', '.', '.', '#'], 
      ['#', '.', '#', '#', '#', '.', '#'], 
      ['#', '.', '.', '@', '#', '.', '#'], 
      ['#', '@', '#', '.', '@', '.', '#'], 
      ['#', '#', '#', '#', '#', '#', '#']], 
      Rat('J', 1, 1),
      Rat('P', 1, 4))
>>> d.move('J',2,2)

Traceback (most recent call last):
  File "<pyshell#167>", line 1, in <module>
    d.move('J',2,2)
  File "C:\Users\gijoe\Downloads\a2.py", line 96, in move
    num_sprouts_left = sum(x.count('@') for x in Maze.content[row][col])
NameError: global name 'row' is not defined
>>> 

エラーメッセージを修正し、ラットを迷路内の任意の場所に移動するのを手伝ってください (廊下にある限り)!