tf.keras.backend.reshape

Reshapes a tensor to the specified shape.

x Tensor or variable.
shape Target shape tuple.

A tensor.

Example:

a = tf.constant([[1, 2, 3], [4, 5, 6], [7, 8, 9], [10, 11, 12]])
a
<tf.Tensor: shape=(4, 3), dtype=int32, numpy=
array([[ 1,  2,  3],
       [ 4,  5,  6],
       [ 7,  8,  9],
       [10, 11, 12]], dtype=int32)>
tf.keras.backend.reshape(a, shape=(2, 6))
<tf.Tensor: shape=(2, 6), dtype=int32, numpy=
array([[ 1,  2,  3,  4,  5,  6],
       [ 7,  8,  9, 10, 11, 12]], dtype=int32)>