From db3cf2e1f4ced299c9e2afb2e0c92c40a2a7d2c0 Mon Sep 17 00:00:00 2001
From: Rohit Gupta <rohitgr1998@gmail.com>
Date: Wed, 4 Nov 2020 15:37:42 +0530
Subject: [PATCH] Update default filename (#4500)

Co-authored-by: Jirka Borovec <Borda@users.noreply.github.com>
Co-authored-by: Jeff Yang <ydcjeff@outlook.com>
---
 pytorch_lightning/callbacks/model_checkpoint.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/pytorch_lightning/callbacks/model_checkpoint.py b/pytorch_lightning/callbacks/model_checkpoint.py
index f3eabf5611..413e96a39a 100644
--- a/pytorch_lightning/callbacks/model_checkpoint.py
+++ b/pytorch_lightning/callbacks/model_checkpoint.py
@@ -366,7 +366,8 @@ class ModelCheckpoint(Callback):
     ) -> str:
         if not filename:
             # filename is not set, use default name
-            filename = "{epoch}-{step}"
+            filename = "{epoch}" + cls.CHECKPOINT_JOIN_CHAR + "{step}"
+
         # check and parse user passed keys in the string
         groups = re.findall(r"(\{.*?)[:\}]", filename)
         if len(groups) >= 0: