From 57db7865e5dd3a2a34647606c8b71f38b3749f43 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fabian=20Sch=C3=B6ppach?=
 <fabian.schoeppach@physik.hu-berlin.de>
Date: Tue, 5 Nov 2024 18:59:48 +0100
Subject: [PATCH] Bug fix: ensure split_data returns a DataFrame

---
 src/perovskite_tandem_database/parsers/tandemparser.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/perovskite_tandem_database/parsers/tandemparser.py b/src/perovskite_tandem_database/parsers/tandemparser.py
index 67aea00..1f1f283 100644
--- a/src/perovskite_tandem_database/parsers/tandemparser.py
+++ b/src/perovskite_tandem_database/parsers/tandemparser.py
@@ -202,7 +202,7 @@ def split_data(data, delimiter='|'):
             expanded_df = pd.DataFrame(expanded_data.tolist(), index=data.index)
             expanded_df.columns = [f'{data.name}_{i}' for i in range(max_len)]
         else:
-            expanded_df = data
+            expanded_df = pd.DataFrame(data)
         return expanded_df
 
     else: