You must feed a value for placeholder tensor 'Placeholder' with dtype float
我是tensorflow的新手,我真的不知道如何解决该问题。
代码类似于:
为火车提供以下值:
1 | sess.run(train_op, feed_dict={images: e, labels: l, keep_prob_fc2: 0.5}) |
使用CNN中的值:
1 | x = tf.placeholder(tf.float32, [None, 10 * 1024]) |
然后出现错误
1
2 InvalidArgumentError (see above for traceback): You must feed a value for placeholder tensor 'Placeholder' with dtype float
[[Node: Placeholder = Placeholder[dtype=DT_FLOAT, shape=[], _device="/job:localhost/replica:0/task:0/gpu:0"]()]]
我使用
我真的不知道为什么会发生此错误。
代码格式
第一位:
1 2 | define the CNN model "image = tf.placeholder(tf.float32, [FLAGS.batch_size, 32,32,1])" is here |
第二个:
1 2 | loss funtion and train_op is here "label = tf.placeholder(tf.float32, [None, FLAGS.batch_size])" is here |
第三个会话:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 | images, labels = getShuffleimage()#here will get shuffle data num_examples = 0 init = tf.initialize_local_variables() with tf.Session() as sess: # Start populating the filename queue. sess.run(init) coord = tf.train.Coordinator() threads = tf.train.start_queue_runners(coord=coord, sess=sess) try: step = 0 while not coord.should_stop(): start_time = time.time() image, label = sess.run([images, labels])#get shuffle images print(image.shape) print(image.dtype) sess.run(train_op, feed_dict={image: image, label: label , keep_prob_fc2: 0.5}) duration = time.time() - start_time except tf.errors.OutOfRangeError: print('Done training after reading all data') finally: # When done, ask the threads to stop. coord.request_stop() # Wait for threads to finish. coord.join(threads) sess.close() |
一些问题
第一
为什么同时使用
秒
您的占位符名称
如果名称是
我认为feed_dict应该是
如果名称为
我看到了代码的一个问题。有两个具有相同名称
也许您可以尝试更改其中一个变量的名称?