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Return a tensor with the same shape and contents as input.

For example:

import tensorflow as tf
val0 = tf.ones((1,), dtype=tf.float32)
a = tf.atan2(val0, val0)
a_identity = tf.identity(a)
print(a.numpy())          #[0.7853982]
print(a_identity.numpy()) #[0.7853982]

input A Tensor.
name A name for the operation (optional).

A Tensor. Has the same type as input.