def costFct(self, targets, outputs) :
		raise NotImplemented("Must be implemented in child")
Fetches a file from the internet. Retry a few times before
dataset/ETHPy150Open tariqdaouda/Mariana/Mariana/costs.py/Cost_ABC.costFct--crossover with--dataset/ETHPy150Open zoofIO/flexx/flexx/util/getphosphor.py/_fetch_file