Python 程序中的“StringVar"问题 [英] Issue with 'StringVar' in Python Program

问题描述

我正在尝试使用 Tkinter 在 Python 中编写一个非常简单的 UI.我在 StringVar 类中遇到了一个小问题.问题是，当我运行 python 脚本时，我在初始化 StringVar 变量的行上收到一个错误.我已经写了一个关于这个问题的示例程序，我想开始工作:

I am trying to write a VERY simple UI in Python using Tkinter. I have run into a small problem with the StringVar class. The thing is, when I run the python script, I get an error on the line that initializes the StringVar variable. I have written a sample program with this issue that I would like to get working:

from Tkinter import *

var = StringVar()
var.set('test');

当我通过 python 运行它时，我看到这个错误:

When I run it through python I see this error:

$ python test.py
Traceback (most recent call last):
  File "test.py", line 3, in <module>
    var = StringVar()
  File "/usr/lib/python2.6/lib-tk/Tkinter.py", line 254, in __init__
    Variable.__init__(self, master, value, name)
  File "/usr/lib/python2.6/lib-tk/Tkinter.py", line 185, in __init__
    self._tk = master.tk
AttributeError: 'NoneType' object has no attribute 'tk'
Exception AttributeError: "StringVar instance has no attribute '_tk'" in <bound method StringVar.__del__ of <Tkinter.StringVar instance at 0xb73cc80c>> ignored

我感觉这是我的 Python 安装问题，但可能是我做错了什么?如果这有所不同，我将在 Ubuntu Linux 上使用 python 版本 2.6.5.

I have a feeling that this is an issue with my Python installation, but it may be that I am doing something wrong? I am using python version 2.6.5 on Ubuntu Linux if that makes a difference.

推荐答案

我认为您可能需要在调用 StringVar 之前显式调用 Tk().

I think you might need to call Tk() explicitly before invoking StringVar.

就这样做:

from Tkinter import *
Tk() # Add this
var = StringVar()
var.set('test');

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