From 9a1be22fede514eb930063f95c0c2b2c4779159c Mon Sep 17 00:00:00 2001
From: Jonathan Prescott-Roy <jjpr@mit.edu>
Date: Wed, 5 Apr 2023 17:02:38 -0400
Subject: [PATCH] DataFrame.append has been removed from the pandas API.  Docs
 recommend using concat instead.

---
 brainio/lookup.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/brainio/lookup.py b/brainio/lookup.py
index 4d7c261..5cacc32 100644
--- a/brainio/lookup.py
+++ b/brainio/lookup.py
@@ -152,7 +152,8 @@ def append(catalog_identifier, object_identifier, cls, lookup_type,
                     f"Trying to add duplicate identifier {object_lookup['identifier']}, existing {duplicates}")
     # append and save
     add_lookup = pd.DataFrame({key: [value] for key, value in object_lookup.items()})
-    catalog = catalog.append(add_lookup)
+    # catalog = catalog.append(add_lookup)
+    catalog = pd.concat((catalog, add_lookup))
     catalog.to_csv(catalog_path, index=False)
     _catalogs[catalog_identifier] = catalog
     return catalog