ValueError when executing softmax_cross_entropy_with_logits

the function softmax_cross_entropy_with_logits has been deprecated. The new function is softmax_cross_entropy_with_logits_v2

cost=tf.reduce_mean(tf.nn.softmax_cross_entropy_with_logits_v2(pred, y))

Documentation

Change

tf.nn.softmax_cross_entropy_with_logits(prediction,y)

to

tf.nn.softmax_cross_entropy_with_logits(logits=prediction, labels=y)