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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 find_description(self, name):
        "Find a description for the given appliance name."
        for desc in self.virtual_system_descriptions:
            values = desc.get_values_by_type(DescType.name,
                                             DescValueType.original)
            if name in values:
                break
        else:
            raise Exception("Failed to find description for %s" % name)
        return desc