知行力

1. tf.repeat>>> a = tf.repeat(['a', 'b', 'c'], repeats=[3, 1, 2], axis=0)[b'a' b'a' b'a' b'b' b'c' b'c']>>> a = tf.repeat(['a', 'b', 'c'], repeats=[3, 1, 2], axis=1)[b'a' b'a' b'a' b'c' b'c']>>> out = tf.repeat([[1, 2],