python for maya_Python for Maya：“对象的名称不唯一。”当从课堂上调用对象来构建用户界面时...

问题：

我没有得到任何语法错误，直到我尝试构建UI时运行脚本。一切似乎都很好，直到我运行最后2行代码。Python for Maya：“对象的名称不唯一。”当从课堂上调用对象来构建用户界面时

我收到以下错误： 错误：RuntimeError：文件行41：对象的名称'mst_txtfld_x_value'不是唯一的。

我行8〜9作出肯定deleteUI，所以我假设文本框正在创建两次。

或者有什么我不了解类应该如何工作？ 我是新来的类，并希望解释为什么我得到这个错误。

验证码：

import maya.cmds as mc

from functools import partial

class MoveSelTool(object):

def __init__(self, *args):

pass

if(mc.window("ak_move_sel_tool_window", query=True, exists=True)):

mc.deleteUI("ak_move_sel_tool_window")

def build_window_UI(self):

self.window = mc.window("ak_move_sel_tool_window",

title="Move Selection Tool")

self.columnLayout = mc.columnLayout()

self.txt_directions = mc.text(align="left",

label="Directions: Input translation increment.\n")

self.rowColumn = mc.rowColumnLayout(numberOfColumns=8)

self.txt_x = mc.text(label=" X: ",

align="right")

self.txtfld_x = mc.textField("mst_txtfld_x_value",

ann='input units to move X',

width=50)

self.txt_y = mc.text(label=" Y: ",

align="right")

self.txtfld_y = mc.textField("mst_txtfld_y_value",

ann='input units to move Y',

width=50)

self.txt_z = mc.text(label=" Z: ",

align="right")

self.txtfld_z = mc.textField("mst_txtfld_z_value",

ann='input units to move Z',

width=50)

self.txt_space = mc.text(label=" ")

self.move_btn = mc.button(label="Move")

#ui commands

mc.button(self.move_btn,

edit=True,

command=partial(self.move_selection))

mc.textField("mst_txtfld_x_value",

enterCommand=partial(self.move_selection))

mc.textField("mst_txtfld_y_value",

enterCommand=partial(self.move_selection))

mc.textField("mst_txtfld_z_value",

enterCommand=partial(self.move_selection))

#show ui

mc.showWindow(self.window)

def query_mst_user_input(self):

self.x_value = mc.textField("mst_txtfld_x_value",

query=True,

text=True)

self.y_value = mc.textField("mst_txtfld_y_value",

query=True,

text=True)

self.z_value = mc.textField("mst_txtfld_z_value",

query=True,

text=True)

return (self.x_value, self.y_value, self.z_value)

def move_selection(self):

self.mst_user_selection = mc.ls(selection=True)

self.mst_user_inputs = query_mst_user_input()

mc.move(self.mst_user_selection,

self.mst_user_inputs[0],

self.mst_user_inputs[1],

self.mst_user_inputs[2],

relative=True)

def show(self):

self.build_window_UI()

mst=MoveSelTool()

mst.show()