將函數綁定到同名的多個標簽 - tkinter

Question

我想允許用戶使用以下代碼創建任意數量的標簽：

def new_line(event):
    global Row_n
    Row_n = Row_n + 1
    Choose= tk.Label(frame, text="Choose option", background = "white",font = ("Helvetica",13),fg = "blue")
    Choose.grid(row = Row_n, column = 0, sticky = 'nsew')
    return Row_n

root.bind('<Return>',lambda event:new_line(event))

這樣，通過按“Enter”，用戶可以創建任意數量的“Choose”標簽。 但是我希望每次用戶單擊“選擇”標簽之一時出現第二個標簽。 所以我使用以下代碼：

def second_l(event):
    Row_n = Row_n+1
    second_label = tk.Label(frame, text="Second label")

Choose.bind('<Button-1>',lambda event:second_l(event))

當我嘗試運行它時，我收到以下錯誤：

無法調用“綁定”命令：應用程序已被銷毀

如果我在“new_line”函數之外添加“Choose”標簽，“second_l”函數將僅適用於該標簽。 它不適用於“new_line”函數生成的標簽。

整個代碼：

import tkinter as tk#to create the gui
from tkinter import filedialog, Text #filedialog to pick apps and Text to display text
import os #Allows us to run apps

root = tk.Tk() 

frame = tk.Frame(root,bg="white")
frame.place(relwidth=0.8,relheight=0.7,relx=0.1,rely=0.1)

Row_n=0

def new_line(event):
    global Row_n
    Row_n = Row_n + 1
    Choose= tk.Label(frame, text="Choose option", background = "white",font = ("Helvetica",13),fg = "blue")
    Choose.grid(row = Row_n, column = 0, sticky = 'nsew')
    return Row_n

root.bind('<Return>',lambda event:new_line(event))

def second_l(event):
    global Row_n
    Row_n = Row_n+1
    second_label = tk.Label(frame, text="Second label")
    second_label.grid(row = Row_n, column = 0, sticky = 'nsew')

Choose.bind('<Button-1>',lambda event:second_l(event))

root.mainloop()

Answer 1

我無法理解您為什么會收到此錯誤“無法調用“綁定”命令”，但我想，我理解您的問題

你可以試試這個： -

import tkinter as tk#to create the gui
from tkinter import filedialog, Text #filedialog to pick apps and Text to display text
import os #Allows us to run apps

root = tk.Tk() 

frame = tk.Frame(root,bg="white")
frame.place(relwidth=0.8,relheight=0.7,relx=0.1,rely=0.1)

Row_n=0
Choose= tk.Label(frame, text="", background = "white",font = ("Helvetica",13),fg = "blue")


def new_line(event):
    global Row_n
    Row_n = Row_n + 1
    Choose.config(text="Choose option")
    Choose.grid(row = Row_n, column = 0, sticky = 'nsew')
    return Row_n

root.bind('<Return>',lambda event:new_line(event))

def second_l(event):
    global Row_n
    Row_n = Row_n+1
    second_label = tk.Label(frame, text="Second label")
    second_label.grid(row = Row_n, column = 0, sticky = 'nsew')

Choose.bind('<Button-1>',lambda event:second_l(event))

root.mainloop()