Python tkinter create multiple variables-CodePudding

I started to code with tkinter and class methods. I try to code a to-do-list where I can create multiple entries by pressing a button below the entry. And a button next to the entry should change the color of the entry if pressed. The problem now is, that when I create multiple entries, the buttons only change the latest entry. So my question is how do I specify the entry when created?

Sry for obvious mistakes, Im new to coding :p

import tkinter as tk
from tkinter.constants import ANCHOR, CENTER, X
from tkinter import messagebox

class App():

    def __init__(self):
        self.window = tk.Tk()
        self.window.title("To-Do-List")
        self.window.geometry("700x700")

        self.x_but, self.y_but = 0.05, 0.2 
        self.x_ent, self.y_ent = 0.05, 0.2
        self.x_but2 = 0.3
        self.check_var = True

        self.start_frame()
        self.grid1()
        self.window.mainloop()
        
    def start_frame(self):
        self.label1 = tk.Label(text="To Do List", font=("", 30))
        self.label1.place(relx=0.5, rely=0.05, anchor=CENTER)

    def grid1(self):
        self.button1 = tk.Button(text="Create", command= self.create_field)
        self.button1.place(relx = self.x_but, rely= self.y_but)

    def create_field(self):
        self.y_but  = 0.05
        self.button1.place(relx= self.x_but, rely= self.y_but)

        self.entry1 = tk.Entry()
        self.entry1.place(relx= self.x_ent, rely= self.y_ent)
        

        self.button_check = tk.Button(text="✅", height= 1,command=self.check)
        self.button_check.place(relx= self.x_but2, rely=self.y_ent)
       



        self.y_ent  = 0.05
    
    def check(self):
        if self.check_var:
            self.entry1.configure(bg="Green")
            self.check_var = False

        else:
            self.entry1.configure(bg="White")
            self.check_var = True

    



app = App()

CodePudding user response：

You are changing the bg of self.entry1 which keeps overwriting itself each time an entry is created, so when button is clicked, it is always the last entry. The easiest solution is to define a parameter for check and then pass the required entry as an argument to it.

So the method would be:

def check(self,ent):
    if self.check_var:
        ent.configure(bg="Green")
        self.check_var = False

    else:
        ent.configure(bg="White")
        self.check_var = True

...and your button would be:

self.button_check = tk.Button(text="✅", height= 1,command=lambda x=self.entry1: self.check(x))

Also I hope you have a good reason to use place because using grid can make your life much easier, in this case.

For more explanation, read: Tkinter assign button command in loop with lambda