From b41f49dbef6daf826a81ba2f95fee0e6890f252e Mon Sep 17 00:00:00 2001
From: William Falcon <falc@fb.com>
Date: Wed, 24 Jul 2019 10:34:21 -0400
Subject: [PATCH] added debugging util

---
 pytorch_lightning/utils/debugging.py | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 pytorch_lightning/utils/debugging.py

diff --git a/pytorch_lightning/utils/debugging.py b/pytorch_lightning/utils/debugging.py
new file mode 100644
index 00000000..7a4d1445
--- /dev/null
+++ b/pytorch_lightning/utils/debugging.py
@@ -0,0 +1,15 @@
+import pdb
+import sys
+
+class ForkedPdb(pdb.Pdb):
+    """A Pdb subclass that may be used
+    from a forked multiprocessing child
+
+    """
+    def interaction(self, *args, **kwargs):
+        _stdin = sys.stdin
+        try:
+            sys.stdin = open('/dev/stdin')
+            pdb.Pdb.interaction(self, *args, **kwargs)
+        finally:
+            sys.stdin = _stdin
\ No newline at end of file