保存和恢复 Tensorflow 模型
在 Tensorflow 中,模型保存和恢复可以保留经过训练的模型并利用它们以供将来使用。以下是涉及的步骤:
保存模型(Tensorflow 0.11 及更高版本):
示例:
# Define placeholders w1 = tf.placeholder("float", name="w1") w2 = tf.placeholder("float", name="w2") # Define operations w3 = tf.add(w1, w2) w4 = tf.multiply(w3, 2.0, name="op_to_restore") # Initialize variables sess = tf.Session() sess.run(tf.global_variables_initializer()) # Create a saver saver = tf.train.Saver() # Save the model saver.save(sess, 'my_model', global_step=1000)
恢复模型:
示例:
# Load the meta graph sess = tf.Session() saver = tf.train.import_meta_graph('my_model-1000.meta') saver.restore(sess, tf.train.latest_checkpoint('./')) # Access saved variables print(sess.run('bias:0')) # Prints the saved bias value # Create placeholders and feed new data w1 = tf.get_default_graph().get_tensor_by_name("w1:0") w2 = tf.get_default_graph().get_tensor_by_name("w2:0") feed_dict = {w1: 13.0, w2: 17.0} # Access and run the operation op_to_restore = tf.get_default_graph().get_tensor_by_name("op_to_restore:0") print(sess.run(op_to_restore, feed_dict)) # Prints the result of the restored operation
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