这个append是什么用法,v['initial_lr']是干嘛的
def _get_init_lr(self):
# get the initial lr, which is set by the scheduler
init_lr_groups_l = []
for optimizer in self.optimizers:
init_lr_groups_l.append([v['initial_lr'] for v in optimizer.param_groups])
return init_lr_groups_l