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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 one_item(self, item, detach:bool=False, denorm:bool=False, cpu:bool=False):
        "Get `item` into a batch. Optionally `detach` and `denorm`."
        ds = self.single_ds
        with ds.set_item(item):
            return self.one_batch(ds_type=DatasetType.Single, detach=detach, denorm=denorm, cpu=cpu)