Tkinter - Change Label Text/Entry on Button Click

Question

I have two labels and entry fields ( A & B ). When I enter the username/password for " A Username/A Password ", I want to click the "Submit" button, then have the labels/entry fields change to " B Username/B Password " and be able to click the "Submit" button again, using Tkinter .

Python Code

import tkinter as tk

root = tk.Tk()

a_user_var = tk.StringVar()
a_pass_var = tk.StringVar()

b_user_var = tk.StringVar()
b_pass_var = tk.StringVar()

def submit():

    a_user = a_user_var.get()
    a_pass = a_pass_var.get()

    a_user_var.set("")
    a_pass_var.set("")

    b_user = b_user_var.get()
    b_pass = b_pass_var.get()

    b_user_var.set("")
    b_pass_var.set("")

a_user_label = tk.Label(root, text="A Username")
a_user_entry = tk.Entry(root, textvariable=a_user_var)

a_pass_label = tk.Label(root, text="A Password")
a_pass_entry = tk.Entry(root, textvariable=a_pass_var, show="•")

b_user_label = tk.Label(root, text="B Username")
b_user_entry = tk.Entry(root, textvariable=b_user_var)

b_pass_label = tk.Label(root, text="B Password")
b_pass_entry = tk.Entry(root, textvariable=b_pass_var, show="•")

sub_btn = tk.Button(root, text="Submit", command=submit)

a_user_label.grid(row=0, column=0)
a_user_entry.grid(row=0, column=1)

a_pass_label.grid(row=1, column=0)
a_pass_entry.grid(row=1, column=1)

b_user_label.grid(row=0, column=0)
b_user_entry.grid(row=0, column=1)

b_pass_label.grid(row=1, column=0)
b_pass_entry.grid(row=1, column=1)

sub_btn.grid(row=2, column=0)

root.mainloop()

Current Result

Desired Result (after clicking Submit button)

Answer 1

There is no need to create a unique label and entry widgets for A and B . Instead just use one set of widgets and change the label's text upon pressing the button to B . If you need to store the contents of the entry widget, you can grab the label text and parse it to see which character the specific set belongs to.

For example:

import tkinter as tk

root = tk.Tk()
user_var = tk.StringVar()
pass_var = tk.StringVar()
entries = {}

def submit():
    user = user_var.get()
    passw = pass_var.get()
    label_text = user_label["text"]
    char = label_text.split()[0]
    entries[char] = (user, passw)
    if char == "A":
        user_label["text"] = "B" + label_text[1:]
        pass_label["text"] = "B" + pass_label["text"][1:]
    user_var.set('')
    pass_var.set('')
    print(entries)


user_label = tk.Label(root, text="A Username")
user_entry = tk.Entry(root, textvariable=user_var)

pass_label = tk.Label(root, text="A Password")
pass_entry = tk.Entry(root, textvariable=pass_var, show="•")

sub_btn = tk.Button(root, text="Submit", command=submit)
sub_btn.grid(row=2, column=0)

user_label.grid(row=0, column=0)
user_entry.grid(row=0, column=1)

pass_label.grid(row=1, column=0)
pass_entry.grid(row=1, column=1)

root.mainloop()