11 implementing loss function

unscaled_logits = tf.constant([[1., -3., 10.]]) 
target_dist = tf.constant([[0.1, 0.02, 0.88]]) 
softmax_xentropy = tf.nn.softmax_cross_entropy_with_logits(logits=unscaled_logits, labels=target_dist) 
print(sess.run(softmax_xentropy)) 
#[1.1601256]