Pads a tensor.tf.compat.v1.pad( tensor, paddings, mode='CONSTANT', name=None, constant_values...[4, 5, 6]])paddings = tf.constant([[1, 1,], [2, 2]])# 'constant_values' is 0.# rank of 't' is 2.tf.pad...# [0, 0, 4, 5, 6, 0, 0], # [0, 0, 0, 0, 0, 0, 0]]tf.pad...# [6, 5, 4, 5, 6, 5, 4], # [3, 2, 1, 2, 3, 2, 1]]tf.pad...case-insensitive)name: A name for the operation (optional).constant_values: In "CONSTANT" mode, the scalar pad