dev branch: rafiki/model/dev.py, isinstance float checking issue

[delphieritas]

issue description:
score = model_inst.evaluate(val_dataset_path) # this is not 'float' type
if not isinstance(score, float):
raise Exception('evaluate() should return a float!') # will raise this ERROR

suggestion:
score = float(model_inst.evaluate(val_dataset_path)) # to make it 'float' type
if not isinstance(score, float):
raise Exception('evaluate() should return a float!')

[wild-flame]

Hi @delphieritas ,

Can you specify which file/line are these codes in?