苦苦于二进制数组:python

时间:2011-04-01 10:30:27

标签: python arrays binary

我目前正在开发一款游戏机器人,希望能够更多地了解编程。不幸的是,当我进入二进制数组的主题时,我正在添加一个看起来很简单的新命令变得非常困难。基本上,我采用了一个已经制作的命令,您可以将项目放在两个位置,以便定义要恢复的区域。我对命令的编辑是,它将允许完整恢复整个地图,而无需放置任何项目来定义地图。

在执行恢复命令之前,将执行备份命令,其中二进制数组由整个映射组成,然后存储在文件中。为了恢复整个地图,新命令仍然必须处理两点的坐标。一个位于地图的底角(0,0,0),然后另一个位于地图顶部相对侧的角落,这将根据您想要的服务器而变化。我解决这个问题的理由是简单地只检索每个坐标的二进制数组的长度。不幸的是,我试图做到这一点并不幸运,我真的不知道如何找到二进制数组的维度。显示了数组的包和解包,以及我无法解决的部分代码。

有一件奇怪的事情是,如果我像if语句一样手动输入数字,那个机器人的ip地址就完全可以了。只是为了制作适用于任何地图而不仅仅是一张地图的代码的任何努力都是徒劳无功的。

enter code here
def onBackup(self,user,filename):
    fn = bakFolder+filename+".backup"
    try:
        f = open(fn,"r")
        self.bot.sendMessage("A backup by that name already exists.")
        f.close()
        return
    except IOError:
      try:
        f = open(fn,"wb")
        f.write(struct.pack("!3i",self.bot.level_x,self.bot.level_y,self.bot.level_z))
        self.bot.block_array.tofile(f)
        self.bot.sendMessage("Backup saved to file %s.backup"%filename)
        print "Backup save to %s.backup"%filename
        return
      except IOError:
        self.bot.sendMessage("Error opening %s.backup"%filename, false)
        print "Backup: Error opening file"
        return
def restoremap(self):
    fn = bakFolder+self.restore_filename+".backup"
    try:
        f = open(fn,"rb")
        header_x, header_y, header_z = struct.unpack('!3i',f.read(12))
        backup_array = array.array('B')
        backup_array.fromfile(f,header_x*header_y*header_z)
        x1,y1,z1 = (0,0,0) 
        if server == "204.232.197.228":
            x2,y2,z2 = (64,1020,64) #special server that already has coordinates
        else:
            x2,y2,z2 = ??? rest of servers, coordinates derived from the binary array
        if x1 > x2 : x1, x2 = x2, x1
        if y1 > y2 : y1, y2 = y2, y1
        if z1 > z2 : z1, z2 = z2, z1
        tiles_to_deglass = []
        tiles_to_build   = []
        while x1 <= x2:
            y = y1
            while y <= y2:
                z = z1
                while z <= z2:
                    offset = self.bot.calculateOffset(x1,y,z)
                    current_tile = int(self.bot.block_array[offset])
                    backup_tile  = int(backup_array[offset])
                    if not ( current_tile == backup_tile):
                        if (current_tile == 0) and (backup_tile in self.valid_blocks):
                            tiles_to_build.append((backup_tile,x1,y,z))
                        elif (current_tile >= 8) and (current_tile <= 11) and (backup_tile == 0):
                            ## This deals with water & lava in what used to be empty spaces
                            ## first we'll glass it all, and then deglass later!
                            self.blocks.append((20,x1,y,z))
                            tiles_to_deglass.append((0,x1,y,z))
                        elif backup_tile == 7:##use stone
                            tiles_to_build.append((0,x1,y,z))
                            tiles_to_build.append((1,x1,y,z))
                        elif backup_tile in self.valid_blocks:
                            ## This is the fall through... We'll try to erase
                            ## the current tile and then restore it to the other state
                            tiles_to_build.append((0,x1,y,z))
                            tiles_to_build.append((backup_tile,x1,y,z))
                        elif (backup_tile == 0) and not (current_tile == 0):
                            tiles_to_build.append((0,x1,y,z))

                    z+=1
                y += 1
            x1 +=1
        self.DrawBlocks()
        self.blocks += tiles_to_build
        self.DrawBlocks()
        self.blocks += tiles_to_deglass
        self.DrawBlocks()
        self.bot.sendMessage("Restoring...",ignorable=True)
        ##self.bot.action_queue.append(SayAction(self.bot,"Done restoring."))
        self.onReset(silent=True)

    except IOError:
        self.bot.sendMessage("Error while restoring (couldn't read file).")

2 个答案:

答案 0 :(得分:1)

似乎唯一使用x2,y2,z2的地方是在这些循环中设置x1,y和z的限制:

    while x1 <= x2:
        y = y1
        while y <= y2:
            z = z1
            while z <= z2:
                offset = self.bot.calculateOffset(x1,y,z)
                current_tile = int(self.bot.block_array[offset])
                ...
                z+=1
            y += 1
        x1 +=1

如果设置x2太大会怎么样?你有例外吗?如果是这样, 也许您可以简单地捕获异常以找出x2的大小。 例如:

    x2=y2=z2=None
    while x2 is None or x1<=x2:
        y = y1
        while y2 is None or y<=y2:
            z = z1
            while z2 is None or z<=z2:
                try:
                    offset = self.bot.calculateOffset(x1,y,z)
                    current_tile = int(self.bot.block_array[offset])
                except Exception: #<-- Change to most specific exception possible
                    if z2 is None:
                        z2=z-1
                    elif y2 is None:
                        y2=y-1
                    elif x2 is None:
                        x2=x1-1
                    break
                ...
                z+=1
            y += 1
        x1 +=1

俗话说,it's easier to ask for forgiveness than permission


PS。要找出要捕获的特定异常,请删除上面的tryexcept并运行脚本,让它失败。回溯错误消息的最后一行告诉您引发的异常类型。例如,它可能会说类似

IndexError: x,y,z out of bounds

在这种情况下,请添加tryexcept,将Exception更改为IndexError

答案 1 :(得分:0)

考虑长度1024;这可以变成(x,y,z):

2  2  256
2  4  128
2  8   64
2 16   32
2 32   16
...
128 4  2
256 2  2

即使数组的长度是1001,你也不会得到非常友好的答案:

 7 11 13
11  7 13
 7 13 11
11 13  7
13 11  7
13  7 11

因此,您保存的文件必须包含每个特定地图的(x,y,z)坐标。

看起来onBackup()例程将 bot 的坐标保存在前三个整数位置(每个四个字节)。您可以通过将机器人移动到地图的最远范围来扩展此程序,然后然后保存坐标。或者您可以看到服务器是否可以某种方式报告地图的范围,并捕获信息。

但我认为你不能猜测给定输入数组的维数。