2013-04-28 78 views
1

我一直在为Minecraft的Raspberry Pi版本制作一个模组,每当我在程序中输入其中一个命令时,我都会感到非常沮丧的错误。这里是我的代码:来自变量内容的Python NameError

import minecraft.minecraft as minecraft 
import minecraft.block as block 
import time 

mc = minecraft.Minecraft.create(); 

print('newBlock - Change ID of block to spawn') 
print('blockType - Change subID of block to spawn') 
print('pos1') 
print('pos2') 
print('fill - fill specified area') 
print('clear - clear specified area') 
print 
while True: 
comm=str(input('Command: ')) 
if comm=="newBlock": 
    blockId = int(input('Enter Block ID: ')) 
    mc.postToChat('Block set to ID: ' + str(blockId)) 
if comm=="blockType": 
    blockData = int(input('Enter Block Type: ')) 
if comm=="pos1": 
    position1 = mc.player.getPos() 
    mc.postToChat('Set Position 1 as: x' + str(position1.x) + ' y' + str(position1.y) + ' z' + str(position1.z)) 
if comm=="pos2": 
    position2 = mc.player.getPos() 
    mc.postToChat('Set Position 2 as: x' + str(position2.x) + ' y' + str(position2.y) + ' z' + str(position2.z)) 
if comm=="fill": 
    mc.setBlocks(position1.x, position1.y, position1.z, position2.x, position2.y, position2.z, blockId, blockType) 
    mc.postToChat('Filled specified area with: ' + str(blockId)) 
if comm=="clear": 
    mc.setBlocks(position1.x, position1.y, position1.z, position2.x, position2.y, position2.z, 0) 
    mc.postToChat('Cleared specified area') 

每次输入是通过变量“通讯”计划吐出此错误消息的用户输入:

Traceback (most recent call last): 
    File "WorldEditPi.py", line 15, in <module> 
     comm=str(input('Command: ')) 
    File "<string>", line 1, in <module> 
NameError: name 'newBlock(or what ever the user entered into 'comm')' is not defined 

请告诉我真的困惑的是,它甚至没有谈论一个变量'newBlock'不是一个变量,它是变量'comm'的内容。这发生在所有命令中,而不仅仅是'newBlock'。

回答

3

您正在使用input,您需要使用raw_inputinput评估它传递的字符串。 raw_input给你一个字符串,这是你想要的。

请注意,这仅适用于Python 2.在Python 3中,raw_input不再可用,input与Python 2的raw_input等效。在Python 2中,input相当于eval(raw_input)

0

当您使用input()输入newBlock时,解析器将newBlock视为变量而不是字符串。所以你需要使用的raw_input

看到输入()

def input(prompt): 
    return (eval(raw_input(prompt))) 
的裁判