tensorflow 参数clipping

一段例程，

import tensorflow as tf

tmp1 = tf.get_variable("a1",[2,2],initializer=tf.random_normal_initializer(stddev=3))
tmp1 = tf.clip_by_value(tmp1, -0.5, 0.5, name=None)

with tf.Session() as sess:
    sess.run(tf.global_variables_initializer())

    writer = tf.summary.FileWriter("logdir", sess.graph)

    print(sess.run(tmp1))

    writer.flush()