From 2a32e3162dbd8c30e6ad4e6513daa54a6abc9efd Mon Sep 17 00:00:00 2001
From: grassknoted <grassknoted@gmail.com>
Date: Thu, 24 Oct 2019 13:54:44 +0530
Subject: [PATCH] changed the way duplicated() handles empty dataframe

---
 pandas/core/frame.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pandas/core/frame.py b/pandas/core/frame.py
index c90bf4ba7151f..ddded5e94cfaa 100644
--- a/pandas/core/frame.py
+++ b/pandas/core/frame.py
@@ -4851,7 +4851,7 @@ def duplicated(self, subset=None, keep="first"):
         from pandas._libs.hashtable import duplicated_int64, _SIZE_HINT_LIMIT
 
         if self.empty:
-            return Series(dtype=bool)
+            return Series(data=[i for i in range(0, self.index.size)], dtype=bool)
 
         def f(vals):
             labels, shape = algorithms.factorize(