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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 option(self, option):
 """ Gets the option, set_section needs to be set before. :param option (string):
 The option to get. :return mixed: The option from from the config. """

        if self.__current_section is None:
            raise RuntimeError('No section set in option-getting')
        return self.__config[self.__current_section][option]