From 508a268cae2dc3e5a628ad6ca01c99e4e3555d35 Mon Sep 17 00:00:00 2001
From: Daniele Padula <daniele.padula@unisi.it>
Date: Sat, 21 Oct 2023 17:11:58 +0200
Subject: [PATCH] Fixed compatibility with Pandas 2.0

---
 pyscopus/scopus.py | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/pyscopus/scopus.py b/pyscopus/scopus.py
index 4f4a839..e789ff3 100644
--- a/pyscopus/scopus.py
+++ b/pyscopus/scopus.py
@@ -66,8 +66,7 @@ def search(self, query, count=100, type_=1, view='COMPLETE'):
         i = 1
         while True:
             index = 25*i
-            result_df = result_df.append(_search_scopus(self.apikey, query, type_, view=view, index=index),
-                                         ignore_index=True)
+            result_df = pd.concat([ result_df, _search_scopus(self.apikey, query, type_, view=view, index=index) ], ignore_index=True)
             if result_df.shape[0] >= count:
                 return result_df[:count]
             i += 1