Learner, Metrics, and Basic Callbacks | fastai
docs.fast.ai › learnerNov 29, 2021 · Basic class for handling the training loop. opt_func will be used to create an optimizer when Learner.fit is called, with lr as a default learning rate. splitter is a function that takes self.model and returns a list of parameter groups (or just one parameter group if there are no different parameter groups).