What's the meaning of the number before the progress bar when tensorflow is training

Question

Could anyone tell me what's the meaning of '10' and '49' in the following log of tensorflow? Much Thanks

INFO:tensorflow:Started compiling

INFO:tensorflow:Finished compiling. Time elapsed: 5.899410247802734 secs

10/10 [==============================] - 23s 2s/step - loss: 2.6726 - acc: 0.1459

49/49 [==============================] - 108s 2s/step - loss: 2.3035 - acc: 0.2845 - val_loss: 2.6726 - val_acc: 0.1459

Epoch 2/100

10/10 [==============================] - 1s 133ms/step - loss: 2.8799 - acc: 0.1693

49/49 [==============================] - 17s 337ms/step - loss: 1.9664 - acc: 0.4042 - val_loss: 2.8799 - val_acc: 0.1693

Answer 1

10 and 49 corresponds to the number of batches which your dataset has been divided into in each epoch.

For example, in your train dataset, there are totally 10000 images and your batch size is 64, then there will be totally math.ceil(10000/64) = 157 batches possible in each epoch.