tf.keras.backend.gather

Retrieves the elements of indices indices in the tensor reference.

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Compat aliases for migration

See Migration guide for more details.

tf.compat.v1.keras.backend.gather

tf.keras.backend.gather(
    reference, indices
)

Arguments
reference	A tensor.
indices	An integer tensor of indices.

Returns
A tensor of same type as reference.

Examples:

var = tf.keras.backend.variable([[1, 2, 3], [4, 5, 6]])
tf.keras.backend.eval(var)
array([[1., 2., 3.],
       [4., 5., 6.]], dtype=float32)
var_gathered = tf.keras.backend.gather(var, [0])
tf.keras.backend.eval(var_gathered)
array([[1., 2., 3.]], dtype=float32)
var_gathered = tf.keras.backend.gather(var, [1])
tf.keras.backend.eval(var_gathered)
array([[4., 5., 6.]], dtype=float32)
var_gathered = tf.keras.backend.gather(var, [0,1,0])
tf.keras.backend.eval(var_gathered)
array([[1., 2., 3.],
       [4., 5., 6.],
       [1., 2., 3.]], dtype=float32)