Python 3.4.1，Tkinter 8.6.3，class 内的事件在寻找 class 按钮时抛出 'Name not defined' 错误

Question

我试图在用户点击另一个按钮后将按钮的状态设置为 'normal'，但无论出于何种原因，该事件似乎无法找到我正在引用的按钮并抛出NameError: name 'rawButton' is not defined' 错误。我尝试在按钮前添加 self.，但随后出现 self not defined 错误。我已经看遍了，我终其一生都无法弄清楚为什么这不起作用……在此先感谢您提供的任何帮助。

相关代码如下：

import tkinter as tk
from imaging import *

class MainClass:
    root = tk.Tk()
    root.title('Main Window')

    def call_bgFrame(self):    
        self.background = bgFrame()
        rawButton.config(state = 'normal')

    labels = ['Calibration','Background','Raw Data','Bin','Plot']

    calibButton = tk.Button(root,text = labels[0], width = 20, height = 5)
    bgButton = tk.Button(root,text = labels[1], width = 20, height = 5)
    rawButton = tk.Button(root,text = labels[2], width = 20, height = 5, state = 'disabled')
    binButton = tk.Button(root,text = labels[3], width = 20, height = 5, state = 'disabled')
    plotButton = tk.Button(text = labels[3], width = 40, height = 5, state = 'disabled')

    calibButton.grid(row = 0, column = 0)
    bgButton.grid(row=0,column=1)
    rawButton.grid(row=0,column=2)
    binButton.grid(row=1,column=0)
    plotButton.grid(row=1,column=1,columnspan = 2)

    bgButton.bind('<Button-1>', call_bgFrame)

    tk.mainloop()

注意：bgFrame() 函数是从 imaging 导入的函数之一，旨在 return 数组（使用 numpy）。

Answer 1

您的编码风格非常混乱。这个问题可以通过坚持更常见的编码风格来解决：将代码移到 __init__ 中，并将对小部件的引用保存为实例变量。

import Tkinter as tk
from imaging import *

class MainClass:
    def __init__(self):
        root = tk.Tk()
        root.title('Main Window')

        labels = ['Calibration','Background','Raw Data','Bin','Plot']

        self.calibButton = tk.Button(root,text = labels[0], width = 20, height = 5)
        self.bgButton = tk.Button(root,text = labels[1], width = 20, height = 5)
        self.rawButton = tk.Button(root,text = labels[2], width = 20, height = 5, state = 'disabled')
        self.binButton = tk.Button(root,text = labels[3], width = 20, height = 5, state = 'disabled')
        self.plotButton = tk.Button(text = labels[3], width = 40, height = 5, state = 'disabled')

        self.calibButton.grid(row = 0, column = 0)
        self.bgButton.grid(row=0,column=1)
        self.rawButton.grid(row=0,column=2)
        self.binButton.grid(row=1,column=0)
        self.plotButton.grid(row=1,column=1,columnspan = 2)

        self.bgButton.configure(command=self.call_bgFrame)

        root.mainloop()

    def call_bgFrame(self):    
        self.background = bgFrame()
        self.rawButton.config(state = 'normal')

app = MainClass()

还有其他一些我要更改的内容，但我尽量使您的代码与原始代码相似。

Python 3.4.1，Tkinter 8.6.3，class 内的事件在寻找 class 按钮时抛出 'Name not defined' 错误

Python 3.4.1, Tkinter 8.6.3, Event within class throwing 'Name not defined' error when looking for class button

python

class

tkinter

nameerror