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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 import_class(self, import_name):
 """ import selected class :param import_name, str, e.g. some.module.MyClass :return the class """

        module_name, class_name = import_name.rsplit(".", 1)
        mod = import_module(module_name)
        check_class = getattr(mod, class_name)
        self.mapping[check_class.name] = check_class
        logger.info("successfully loaded class %s", check_class)
        return check_class