Exception for KerasCallback on multiple losses

[wouterdewinter]

My model has multiple losses and I get the following error using the KerasCallback. It seems that the callback sends a list which is not supported by the backend.

Traceback (most recent call last):
  File "dsb_train.py", line 69, in <module>
    pipeline=pipeline)
  File "/Users/wouter/.aetros/wouterdewinter/dsb-2018/27546ea456ec6e659a5811e5cadd39eff5e4da26/dsb/model.py", line 325, in train
    verbose=0
  File "/Users/wouter/anaconda2/envs/deep-matting/lib/python3.6/site-packages/keras/legacy/interfaces.py", line 91, in wrapper
    return func(*args, **kwargs)
  File "/Users/wouter/anaconda2/envs/deep-matting/lib/python3.6/site-packages/keras/engine/training.py", line 2213, in fit_generator
    callbacks.on_epoch_end(epoch, epoch_logs)
  File "/Users/wouter/anaconda2/envs/deep-matting/lib/python3.6/site-packages/keras/callbacks.py", line 76, in on_epoch_end
    callback.on_epoch_end(epoch, logs)
  File "/Users/wouter/anaconda2/envs/deep-matting/lib/python3.6/site-packages/aetros/KerasCallback.py", line 271, in on_epoch_end
    self.all_losses.send(log['epoch'], losses)
  File "/Users/wouter/anaconda2/envs/deep-matting/lib/python3.6/site-packages/aetros/backend.py", line 292, in send
    raise Exception('Could not send channel value for ' + self.name+' since type ' + type(y).__name__+' is not supported. Use int, float or string values.')
Exception: Could not send channel value for All loss since type list is not supported. Use int, float or string values.