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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 ddb_to_dict(item):
 # type: (Dict[str, Any]) -> Dict[str, Any] # TODO: narrow these types down """Converts a raw DynamoDB item to a native Python dictionary. :param dict item: DynamoDB item :returns: Native item :rtype: dict """

    deserializer = TypeDeserializer()
    return {key: deserializer.deserialize(value) for key, value in item.items()}