I am running my code on google colabs but my sequential model is not compiling. I could not create a new Sequential mode from a pre-existing model and compile it. I have called compile function from model but I have no idea why the error pops up. I don't know where I messed up. Actually Im doing something different but this is a simplied code with intention to find error.
train_path = '/content/drive/My Drive/ML/train'
model_custom=load_model("/content/drive/My Drive/ML/model_after_vgg_back_up.h5")
model=Sequential()
for layer in model_custom.layers:
model.add(layer)
model.compile(Adam(lr=0.0001),loss='categorical_crossentropy',metrics=['accuracy'])
train_batches = ImageDataGenerator().flow_from_directory(train_path,target_size=[224,224],classes=['mom','nanu','prabesh','sanu'],batch_size=15)
valid_path = '/content/drive/My Drive/ML/test1'
valid_batches = ImageDataGenerator().flow_from_directory(valid_path,target_size=[224,224],classes=['mom','nanu','prabesh','sanu'],batch_size=15)
model.fit_generator(train_batches,validation_data=valid_batches,validation_steps=1,steps_per_epoch=35,verbose=2,epochs=3)
Traceback is like follows:
Found 569 images belonging to 4 classes.
Found 12 images belonging to 4 classes.
---------------------------------------------------------------------------
RuntimeError Traceback (most recent call last)
<ipython-input-16-c160c47bcd7c> in <module>()
7 valid_path = '/content/drive/My Drive/ML/test1'
8 valid_batches = ImageDataGenerator().flow_from_directory(valid_path,target_size=[224,224],classes=['mom','nanu','prabesh','sanu'],batch_size=15)
----> 9 model.fit_generator(train_batches,validation_data=valid_batches,validation_steps=1,steps_per_epoch=35,verbose=2,epochs=3)
/usr/local/lib/python3.6/dist-packages/keras/legacy/interfaces.py in wrapper(*args, **kwargs)
89 warnings.warn('Update your `' + object_name + '` call to the ' +
90 'Keras 2 API: ' + signature, stacklevel=2)
---> 91 return func(*args, **kwargs)
92 wrapper._original_function = func
93 return wrapper
/usr/local/lib/python3.6/dist-packages/keras/engine/training.py in fit_generator(self, generator, steps_per_epoch, epochs, verbose, callbacks, validation_data, validation_steps, class_weight, max_queue_size, workers, use_multiprocessing, shuffle, initial_epoch)
1416 use_multiprocessing=use_multiprocessing,
1417 shuffle=shuffle,
-> 1418 initial_epoch=initial_epoch)
1419
1420 @interfaces.legacy_generator_methods_support
/usr/local/lib/python3.6/dist-packages/keras/engine/training_generator.py in fit_generator(model, generator, steps_per_epoch, epochs, verbose, callbacks, validation_data, validation_steps, class_weight, max_queue_size, workers, use_multiprocessing, shuffle, initial_epoch)
38
39 do_validation = bool(validation_data)
---> 40 model._make_train_function()
41 if do_validation:
42 model._make_test_function()
/usr/local/lib/python3.6/dist-packages/keras/engine/training.py in _make_train_function(self)
494 def _make_train_function(self):
495 if not hasattr(self, 'train_function'):
--> 496 raise RuntimeError('You must compile your model before using it.')
497 self._check_trainable_weights_consistency()
498 if self.train_function is None:
RuntimeError: You must compile your model before using it.
