From 18275b70947358303e72f7e4fd7c61b66d3157da Mon Sep 17 00:00:00 2001
From: Sid Jha <45739834+sidjha1@users.noreply.github.com>
Date: Sat, 5 Oct 2024 13:10:00 -0700
Subject: [PATCH] Create a New Dataframe for Map (#14)

Previously, map would update the dataframe in place. Changing it so that
map creates a new dataframe. This fits better with the semantics of the
other operators.
---
 lotus/sem_ops/sem_map.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lotus/sem_ops/sem_map.py b/lotus/sem_ops/sem_map.py
index 99a5d940..2e903c91 100644
--- a/lotus/sem_ops/sem_map.py
+++ b/lotus/sem_ops/sem_map.py
@@ -126,7 +126,7 @@ def __call__(
             strategy=strategy,
         )
 
-        new_df = self._obj
+        new_df = self._obj.copy()
         new_df[suffix] = outputs
         if return_explanations:
             new_df["explanation" + suffix] = explanations