def addUser(self): postgres = Postgres() login = self.loginEntry.get() password = self.passwordEntry.get() role = self.roleEntry.get() badInput = False errorMessage = "Пожалуйста, введите" if not login: errorMessage += " логин" badInput = True if not password: errorMessage += " пароль" badInput = True if not role: errorMessage += " роль" badInput = True if badInput: answer = mb.showerror(parent=self.window, message=errorMessage) else: postgres.addUser(login, password, role) self.update()