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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def add_error(self, txt):
 """Add a message in the configuration errors list so we can print them all in one place Set the object configuration as not correct :param txt: error message :type txt: str :return: None """

        self.configuration_errors.append(txt)
        self.conf_is_correct = False