Question

我无法跟踪我得到的错误：

Traceback (most recent call last):
  File "/Users/joelwilliams/Desktop/delete me", line 30, in <module>
    v.writef( '======================', 10, 10 )
  File "/Users/joelwilliams/Desktop/delete me", line 24, in writef
    self.write( word )
  File "/Users/joelwilliams/Desktop/delete me", line 15, in write
    self.l[ self.y ] [ self.x : ( self.x + len( word ) ) ] = word
IndexError: list index out of range

主要代码在这里：

class board():
    def __init__( self ):
        self.x, self.y = 0, 0
        self.l = []
        self.screenWidth, self.screenHeight = 0, 0

    def createBoard( self ):
        listBig = [ ['`'] * self.screenWidth for _ in range( self.screenHeight ) ]

    def setup( self, sw, sh ):
        self.screenWidth = sw - 1
        self.screenHeight = sh - 1

    def write( self, word ):
        self.l[ self.y ] [ self.x : ( self.x + len( word ) ) ] = word

    def draw( self ):
        for v in self.l:
            print(''.join(v))

    def writef( self, word, y, x ):
        self.cursorPosX = x - 1
        self.cursorPosY = y - 1
        self.write( word )

v = board()
v.setup( 75, 20 )
v.createBoard()

v.writef( '======================', 10, 10 )
v.writef( '=                    =', 11, 10 )
v.writef( '=   Pls Work.        =', 12, 10 )
v.writef( '=                    =', 13, 10 )
v.writef( '======================', 14, 10 )

v.draw()

所需的结果是控制台显示：

           ======================
           =                    =
           =   Pls Work.        =
           =                    =
           ======================

我使用this作为创建上述代码的指南提前谢谢！

Answer 1

在createBoard()方法中：

def createBoard( self ):
    listBig = [ ['`'] * self.screenWidth for _ in range( self.screenHeight ) ]

您正在创建正确长度和高度的列表，但您从未将其分配给self.l。所以self.l仍然是长度为0的列表。

另外，在write()方法中：

def write( self, word ):
    self.l[ self.y ] [ self.x : ( self.x + len( word ) ) ] = word

看起来你想要self.cursorPosX（和Y）而不是self.x和self.y。

进行这两项更改，您的计划应该按照您的目标进行。

Answer 2

您的代码

创建一个委员会（现在self.l == []）
通过两个函数调用设置电路板，其中一个设置函数局部变量bigList;也许你打算设置self.l（但仍然是self.l == []）
设置两个未在其他地方引用的实例变量cursorPosX和cursorPosY;我假设您打算设置x和y（仍然是self.l == []）
尝试检索self.l（self.l == []）

如果你在某个地方实际初始化self.l会有所帮助。我建议将.__init__()，.setup()和.createBoard()合并为一个，与.write()和.writef()类似。像这样的东西::

class Board():
  def __init__(self, width, height):
    self.l = [['`'] * (width - 1) for _ in range(height - 1)]

  def write(self, text, x, y):
    dx = x + len(text)
    self.l[y][x:dx] = text

  def draw(self):
    for row in self.l:
      print(''.join(row))

请注意，无用的成员变量screenWidth，screenHeight，x，y，cursorPosX和cursorPosY都已被删除。

要使用此新代码：

board = Board(75, 20)
board.write('======================', 10, 10)
board.write('=                    =', 11, 10)
board.write('=   Pls Work.        =', 12, 10)
board.write('=                    =', 13, 10)
board.write('======================', 14, 10)
board.draw()

索引错误：列表索引超出范围（Python） - 打印到控制台

2 个答案: