--The operation of each DB was written out as def. --root = tk.Tk () Display system from the following ――It feels like it's well organized.
#!/usr/bin/env python
# -*- coding: utf-8 -*-
import tkinter as tk
import pyotp
import sqlite3
import os
def create_table():
    #Connect to database
    conn = sqlite3.connect('gauth.db')
    c = conn.cursor()
    #Creating a table
    sql='''CREATE TABLE gauth
    (id integer primary key AUTOINCREMENT,
     name text,
     private_key text)'''
    c.execute(sql)
    #Save (commit) the inserted result
    conn.commit()
    #Close when you have finished accessing the database
    conn.close()
def view():
    #Connect to database
    conn = sqlite3.connect('gauth.db')
    c = conn.cursor()
    for a in c.execute("select * from gauth"):
        totp = pyotp.TOTP(a[2])  #Key value
        totp.now()
        #Label for display
        Static1 = tk.Label(text=a[1])
        Static1.pack(side='left')
        Static2 = tk.Label(text=totp.now())
        Static2.pack(side='left')
    #Save (commit) the inserted result
    conn.commit()
    #Close when you have finished accessing the database
    conn.close()
def insert(id,username,private_key):
    #Connect to database
    conn = sqlite3.connect('gauth.db')
    c = conn.cursor()
    #Insert data
    c.execute(
        "INSERT INTO gauth VALUES (?,?,?)",(id,username,private_key))
    #Save (commit) the inserted result
    conn.commit()
    #Close when you have finished accessing the database
    conn.close()
#Create window and title with tkinter
#Specify window size
root = tk.Tk()
root.title(u"g_authentication_tool")
root.geometry("300x200")
#menu bar
menubar = tk.Menu(root)
filemenu = tk.Menu(menubar)
filemenu.add_command(label="sign up")
filemenu.add_command(label="Delete registration")
filemenu.add_command(label="close")
menubar.add_cascade(label="File", menu=filemenu)
root.config(menu=menubar)
if(os.path.exists('gauth.db')):
    view()
else:
    create_table()
    #insert(1,"user1",'base32secret3232')
    view()
root.mainloop()
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