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Packs user-provided data into a tuple.

This is a convenience utility for packing data into the tuple formats that Model.fit uses.

Standalone usage:

x = tf.ones((10, 1))
data = tf.keras.utils.pack_x_y_sample_weight(x)
isinstance(data, tf.Tensor)
y = tf.ones((10, 1))
data = tf.keras.utils.pack_x_y_sample_weight(x, y)
isinstance(data, tuple)
x, y = data

x Features to pass to Model.
y Ground-truth targets to pass to Model.
sample_weight Sample weight for each element.

Tuple in the format used in Model.fit.