def addReader(self): postgres = Postgres() name = self.nameEntry.get() surname = self.surnameEntry.get() patronymic = self.patronymicEntry.get() studbilet = self.studbiletEntry.get() badInput = False errorMessage = "Пожалуйста, введите" if not name: errorMessage += " имя" badInput = True if not surname: errorMessage += " фамилию" badInput = True if not studbilet: errorMessage += " студенческий билет" badInput = True if badInput: answer = mb.showerror(parent=self.window, message=errorMessage) else: postgres.addReader(name, surname, patronymic, studbilet) self.update()