From c0c1cf058f288c00008579e1e03aad979fe8642d Mon Sep 17 00:00:00 2001
From: William Falcon <falc@fb.com>
Date: Sat, 5 Oct 2019 15:36:12 -0400
Subject: [PATCH] cleaning up demos

---
 pytorch_lightning/trainer/trainer.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/pytorch_lightning/trainer/trainer.py b/pytorch_lightning/trainer/trainer.py
index 6b66e5ec..650af0fd 100644
--- a/pytorch_lightning/trainer/trainer.py
+++ b/pytorch_lightning/trainer/trainer.py
@@ -636,6 +636,8 @@ class Trainer(TrainerIO):
         self.get_test_dataloaders = model.test_dataloader
         self.get_val_dataloaders = model.val_dataloader
 
+        # call warnings from proc zero only which triggers dataloaders
+        # if those have to download data it will only happen on proc 0
         if self.proc_rank == 0:
             if self.use_ddp and not isinstance(self.get_train_dataloader().sampler, DistributedSampler):
                 msg = """