python with gui and db, using standard library.

full-stack-std.py

import sqlite3
from tkinter import *

conn = sqlite3.connect(':memory:')
cursor = conn.cursor()
cursor.execute('create table names (name text)')


def add_name(name):
    cursor.execute('insert into names values (?)', (name,))


def get_names():
    names = [row[0] for row in cursor.execute('select * from names')]
    return ','.join(str(name) for name in names)


window = Tk()
window.geometry('350x200')
window.title("Hi")


def clicked():
    add_name(txt.get())
    lbl.configure(text=get_names())


txt = Entry(window, width=10)
btn = Button(window, text="Click Me", command=clicked)
lbl = Label(window, text='...', font=("Arial Bold", 12))

txt.grid(column=1, row=0)
btn.grid(column=2, row=0)
lbl.grid(column=0, row=1)

txt.focus()
window.mainloop()