From 74defe624681d4899ce0fcc1af8bdaab96055484 Mon Sep 17 00:00:00 2001
From: Arnaud TOURNIER <ltearno@gmail.com>
Date: Thu, 17 Mar 2022 13:05:09 +0100
Subject: [PATCH] use pd.concat instead of append (perf and warning)

---
 src/pytti/ImageGuide.py | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/src/pytti/ImageGuide.py b/src/pytti/ImageGuide.py
index 804a9d7..638c729 100644
--- a/src/pytti/ImageGuide.py
+++ b/src/pytti/ImageGuide.py
@@ -329,12 +329,10 @@ def train(
                     df.index.name = "Step"
             else:
                 for j, (df, loss) in enumerate(zip(self.dataframe, losses_raw)):
-                    self.dataframe[j] = df.append(
-                        pd.DataFrame(
-                            {str(k): float(v) for k, v in loss.items()}, index=[i]
-                        ),
-                        ignore_index=False,
-                    )
+                    frames = [df] + [pd.DataFrame(
+                        {str(k): float(v) for k, v in loss.items()}, index=[i]
+                    )]
+                    self.dataframe[j] = pd.concat(frames, ignore_index=False)
                     self.dataframe[j].name = "Step"
 
         return {"TOTAL": float(total_loss)}