python代码，需要帮助。名称未定义错误

我得到了这个错误：

from gasp import *

GRID_SIZE = 30
MARGIN = GRID_SIZE

BACKGROUND_COLOR = (0,0,0)    # Colors we use
WALL_COLOR = (0.6 * 255, 0.9 * 255, 0.9 * 255)

# The shape of the maze.  Each character
# represents a different type of object
#   % - Wall
#   . - Food
#   o - Capsule
#   G - Ghost
#   P - Chomp
# Other characters are ignored


the_layout = [
  "%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%",    
  "%.....%.................%.....%",
  "%o%%%.%.%%%.%%%%%%%.%%%.%.%%%o%",
  "%.%.....%......%......%.....%.%",
  "%...%%%.%.%%%%.%.%%%%.%.%%%...%",
  "%%%.%...%.%.........%.%...%.%%%",
  "%...%.%%%.%.%%% %%%.%.%%%.%...%",
  "%.%%%.......%GG GG%.......%%%.%",
  "%...%.%%%.%.%%%%%%%.%.%%%.%...%",
  "%%%.%...%.%.........%.%...%.%%%",
  "%...%%%.%.%%%%.%.%%%%.%.%%%...%",
  "%.%.....%......%......%.....%.%",
  "%o%%%.%.%%%.%%%%%%%.%%%.%.%%%o%",
  "%.....%........P........%.....%",
  "%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%"]


class Immovable:
    pass
class Nothing(Immovable):
    pass

class Maze:
    def __init__(self):
        self.have_window = False
        self.game_over = False
        self.set_layout(the_layout)
        set_speed(20)

    def set_layout(self, layout):
        height = len(layout)                   
        width = len(layout[0])                
        self.make_window(width, height)
        self.make_map(width, height)         
        max_y = height - 1
        for x in range( width ):          
            for y in range(height):
                char = layout[max_y - y][x]   
                self.make_object((x, y), char) 

    def make_window(self, width, height):
        grid_width = (width -1) * GRID_SIZE
        grid_height = (height - 1) * GRID_SIZE
        screen_width = 2 * MARGIN + grid_width
        screen_height = 2 *  MARGIN + grid_height
        begin_graphics(screen_width, screen_height,"Chomp",BACKGROUND_COLOR)

    def to_screen(self, point):
        (x,y) = point
        x = x * GRID_SIZE + MARGIN
        y = y * GRID_SIZE + MARGIN
        return(x,y)

    def make_map(self, width, height):
        self.width = width
        self.height = height
        self.map = []
        for y in range(width):
            new_row = []
            for x in range(width):
                new_row.append(Nothing())
            self.map.append(new_row)

    def make_object(self,point,charactor):
        (x,y) = point
        if charactor == "%":
            self.map[y][x] = Wall(self,point)

    def finished(self):
        return self.game_over

    def play(self):
        update_when('next_tick')

    def done(self):
        end_graphics()
        self.map = []




class Wall(Immovable):
    def __init__(self, maze, point):
        self.place = point                          # Store our position
        self.screen_point = maze.to_screen(point)
        self.maze = maze                            # Keep hold of Maze
        self.draw()

    def draw(self):
        (screen_x, screen_y) = self.screen_point
        dot_size = GRID_SIZE * 0.2
        Circle(self.screen_point, dot_size,        # Just draw circle
               color = WALL_COLOR, filled=True)

the_maze = Maze()

while not the_maze.finished():
    the_maze.play()

the_maze.done()

Andy@Macbook-Pro~/Documents/workspace/pythoncode$python gasp.py
回溯（最近一次呼叫最后一次）：
文件“gasp.py”，第1行，在
从gasp进口*
文件“/Users/Andy/Documents/workspace/pythoncode/gasp.py”，第42行，在
班级迷宫：
文件“/Users/Andy/Documents/workspace/pythoncode/gasp.py”，第55行，在迷宫中
对于范围内的x（宽度）：
NameError:未定义名称“宽度”

您可能在范围（宽度）中x的

行前面有缩进问题：

导致Python认为该行与

def

行处于同一级别。请清除源文件中的制表符，然后重试。

您可能在范围（宽度）中x的

行前面有缩进问题：

导致Python认为该行与

def

行处于同一级别。请清除源文件中的制表符，然后重试。

第55行的宽度两侧是否有不可打印/非空白字符？

第55行的宽度两侧是否有不可打印/非空白字符？

为什么模块名为gasp.py，但您的开头语句是“from gasp import*”？

为什么模块名为gasp.py，而您的开场白是“from gasp import*”？

尝试更改文件名

从gasp进口

---

它们是相同的

尝试更改文件名

从gasp进口

---

它们是相同的

，会导致引用特定字符的语法错误

width

看起来已定义，但它没有定义--这是一个空白问题。这将导致引用特定字符时出现语法错误<代码>宽度看起来已定义，但它没有定义--这是一个空白问题。原因可能与y和x都在迷宫中迭代范围（宽度）相同。make_-map方法。原因可能与y和x都在迷宫中迭代范围（宽度）相同。make_-map方法。无法重现

名称错误

（在注释掉所有缺失的函数和导入

之后）。如果有问题的行55被删除了4个空格，则可以复制它（无论导入是否完成）。无法复制
NameError
（注释掉所有缺失的函数和导入
之后）。如果有问题的行55被4个空格删除，则可以复制它（无论导入是否完成）。
Andy@Macbook-Pro~/Documents/workspace/pythoncode$python gasp.py
Traceback (most recent call last):
File "gasp.py", line 1, in <module>
    from gasp import *
File "/Users/Andy/Documents/workspace/pythoncode/gasp.py", line 42, in <module>
    class Maze:
File "/Users/Andy/Documents/workspace/pythoncode/gasp.py", line 55, in Maze
    for x in range( width ):
NameError: name 'width' is not defined