有没有办法使用在 tkinter 中添加标签的相同按钮删除标签？

Question

from tkinter import *
import time
root = Tk()
label = Label(root, text="enter Something below")
label.pack()
textbox = Entry(root)
textbox.pack()
label2 = Label(root, text = textbox.get())
def save():
    
    if label2.winfo_exists == 1:
        label2.pack_forget()
        label2.pack()

    else:
        label2.pack_forget()
        label2.pack()

button = Button(root, text="press for repetition", command=save)
button.pack()
root.mainloop()

当我第二次按下按钮时，没有任何东西被删除，所以我想做的是删除已经用同一个按钮打包的东西。所以如果我输入你好，那么你好吗？

结果是这样的：

Enter Something below
(this is the textbox)
Hello
How are you?

我希望 Hello 已被删除，只显示 How are you?。

Answer 1

您不需要销毁标签并重新创建标签。只需创建标签一次，然后在 save() 函数中更新其文本：

from tkinter import *
root = Tk()
label = Label(root, text="enter Something below")
label.pack()
textbox = Entry(root)
textbox.pack()
label2 = Label(root) # create the hidden label 
def save():
    # update the label text
    label2.config(text=textbox.get()) 
    # show the label. remove 'before=button' to show it below the button
    label2.pack(before=button) 
button = Button(root, text="press for repetition", command=save)
button.pack()
root.mainloop()

有没有办法使用在 tkinter 中添加标签的相同按钮删除标签？

Is there a way to delete a label with the same button that also adds a label in tkinter?

python

tkinter

python-3.9