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Creates a Dataset from another Dataset, discarding duplicates. (deprecated)
tf.contrib.data.unique()
Use this transformation to produce a dataset that contains one instance of each unique element in the input. For example:
dataset = tf.data.Dataset.from_tensor_slices([1, 37, 2, 37, 2, 1])
# Using `unique()` will drop the duplicate elements.
dataset = dataset.apply(tf.data.experimental.unique()) # ==> { 1, 37, 2 }
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A Dataset transformation function, which can be passed to
tf.data.Dataset.apply.
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