变量内容中的Python NameError

我一直在为Minecraft的Raspberry Pi版本制作一个mod,每次我在程序中输入一个命令时,都会遇到一个非常令人沮丧的错误.这是我的代码：

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')

每次用户通过变量“ comm”输入输入时,程序都会显示以下错误消息：

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

真正令人困惑的是,它甚至没有在谈论变量“ newBlock”不是变量,而是变量“ comm”的内容.所有命令都会发生这种情况,而不仅仅是“ newBlock”.

解决方法:

您在需要使用raw_input的地方使用输入.输入评估它传递的字符串. raw_input给您一个字符串,这是您想要的.

请注意,这仅适用于Python2.在Python 3中,raw_input不再可用,并且输入等效于Python 2的raw_input.在Python 2中,输入等效于eval(raw_input)

标签：minecraft,nameerror,python
来源： https://codeday.me/bug/20191013/1904308.html