train.py: shuffling at every epoch

train.py

@@ -59,7 +59,7 @@ def prepare_dataloaders(hparams):
     train_sampler = DistributedSampler(trainset) \
         if hparams.distributed_run else None
 
-    train_loader = DataLoader(trainset, num_workers=1, shuffle=False,
+    train_loader = DataLoader(trainset, num_workers=1, shuffle=True,
                               sampler=train_sampler,
                               batch_size=hparams.batch_size, pin_memory=False,
                               drop_last=True, collate_fn=collate_fn)