jz314

@Codeguyross I had the same problem and in my case it was because the models stored in the trials were not pickle-able. My workaround was to delete it from trials.trials,...

another thing I noticed: when calling this via the hyperas wrapper using `tpe.suggest` mentioned [here](https://github.com/maxpumperla/hyperas/pull/102), it is important to make initial `max_evals` > 20 because the first 20 evals by...