From 1514810c3a5939379c1816c495cc9407a01d2865 Mon Sep 17 00:00:00 2001
From: William Falcon <falc@fb.com>
Date: Wed, 7 Aug 2019 13:21:25 -0400
Subject: [PATCH] updated docs

---
 docs/LightningModule/properties.md | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/docs/LightningModule/properties.md b/docs/LightningModule/properties.md
index 060f2ec8f3..890d9f2007 100644
--- a/docs/LightningModule/properties.md
+++ b/docs/LightningModule/properties.md
@@ -38,3 +38,17 @@ self.trainer.current_epoch
 ...   
 ```   
 
+## Debugging   
+The LightningModule also offers these tricks to help debug.   
+
+---   
+#### example_input_array    
+In the LightningModule init, you can set a dummy tensor for this property
+to get a print out of sizes coming into and out of every layer.   
+```python
+def __init__(self):
+    # put the dimensions of the first input to your system
+    self.example_input_array = torch.rand(5, 28 * 28)
+```    
+
+