validation steps

Hi, thank you for your work! It helps me a lot.

I run into a issue after I convert the brats data and start the training by : python train_isensee2017.py or python train.py, but it show me some problem with validation steps. Any suggestions about my issue?

(tensorflow)root@ubuntu:~/3DUnetCNN/brats# python train_isensee2017.py Using TensorFlow backend. 2018-02-23 09:35:45.097413: I tensorflow/core/platform/cpu_feature_guard.cc:137] Your CPU supports instructions that this TensorFlow binary was not compiled to use: SSE4.1 SSE4.2 AVX Loading previous validation split… Number of training steps: 0 Number of validation steps: 0 Traceback (most recent call last): File “train_isensee2017.py”, line 117, in <module> main(overwrite=config[“overwrite”]) File “train_isensee2017.py”, line 112, in main n_epochs=config[“n_epochs”]) File “/root/3DUnetCNN/unet3d/training.py”, line 88, in train_model early_stopping_patience=early_stopping_patience)) File “/root/tensorflow/lib/python3.4/site-packages/keras/legacy/interfaces.py”, line 91, in wrapper return func(*args, **kwargs) File “/root/tensorflow/lib/python3.4/site-packages/keras/engine/training.py”, line 2115, in fit_generator raise ValueError(‘validation_steps=None is only valid for a’ ValueError: validation_steps=None is only valid for a generator based on the keras.utils.Sequence class. Please specify validation_steps or use the keras.utils.Sequence class. Closing remaining open files:/root/3DUnetCNN/brats/brats_data.h5…done

Thank you!

[Joeng22]

File train.py/ train_isensee2017.py line No.46

set, config[“overwrite”] = True (False by default) " (original) config[“overwrite”] = False # If True, will previous files. If False, will use previously written files. "

Now working fine

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