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# -*- coding: utf-8 -*- import tkinter as tk import datetime class TelaPrincipal: def __init__(self, master): self.nossaTela = master self.lblRelogio = tk.Label( self.nossaTela, font=('Arial', 26), fg='Black') self.lblRelogio.pack(pady=30, padx=30) self.alteracao() def alteracao(self): now = datetime.datetime.now() self.lblRelogio['text'] = now.strftime('%H:%M:%S') self.nossaTela.after(1000, self.alteracao) janelaRaiz = tk.Tk() TelaPrincipal(janelaRaiz) janelaRaiz.mainloop()