tkinter:如何编写一个for循环来销毁标签列表?

时间:2018-11-17 08:14:56

标签: python-3.x for-loop tkinter label destroy

我正在尝试从网格中删除这些元素。通过逐个写出,我可以删除所有这些文件。然后,我编写了一个for循环以使其可扩展,然后遇到此错误消息。

"employee.destroy()
AttributeError: 'str' object has no attribute 'destroy'"

这是一个更大程序的一部分,但是我可以尽最大努力解决核心问题,这是我的代码:

import tkinter as tk
from tkinter import ttk

labelemployee={}

class Application(ttk.Frame): #inherent from frame.

    def __init__(self, parent):
        tk.Frame.__init__(self, parent, bg="LightBlue4")
        self.parent = parent
        self.Employees = ["A", "B", "C", "D"]
        self.pack(fill=tk.BOTH, expand=1)
        self.GUI()

    def GUI(self): #the function that runs all the GUI functions.
        self.buttons()
        self.create_grid()
        self.add_left_names()

    def remove(self):
        #labelemployee["A"].destroy()
        #labelemployee["B"].destroy()
        #labelemployee["C"].destroy()
        #labelemployee["D"].destroy()
        for employee in labelemployee:
            employee.destroy()

    def create_grid(self):
        for i in range (7):
             for j in range(7):
                self.label = tk.Label(self, relief="ridge", width=12, 
                       height=3)
                self.label.grid(row=i, column=j, sticky='nsew')

    def buttons(self):
        self.button=tk.Button(self, text="Clear", bg="salmon", command 
             = self.remove)
        self.button.grid(row=7, column=6, sticky='e')

    def add_left_names(self):
       #--------add in name labels on the side--------------        
        i=2
        for employee in self.Employees:
            self.label=tk.Label(self, text=employee ,  fg="red", 
               bg="snow")
            self.label.grid(row=i,column=0)
            labelemployee[employee]=self.label
            i +=1

def main():
    root = tk.Tk()
    root.title("class basic window")
    root.geometry("1000x500")
    root.config(background="LightBlue4")
    app = Application(root)
    root.mainloop()

if __name__ == '__main__':
    main()

请帮助我。我认为问题是我的for循环存储了一个列表,并且我有一个字典。因此,我想我不知道如何破坏字典中的标签。

1 个答案:

答案 0 :(得分:1)

您已经在这些评论中找到了问题!

您已经知道labelemployee是字典,因此对其进行迭代将默认为您提供字典的键。因此employee将是 A B ...之类的字符串。销毁字符串对象显然会给您一个错误。您需要销毁相应的tkinter小部件。因此,您应该在for循环中将employee.destroy()替换为labelemployee[employee].destroy()