From 6125b701f7c74a3686f379b73801b6a2f4d5abe0 Mon Sep 17 00:00:00 2001
From: Matthew Carbone <x94carbone@gmail.com>
Date: Sun, 5 Nov 2023 10:50:30 -0500
Subject: [PATCH] Fix mutable default argument

---
 lightshow/database.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lightshow/database.py b/lightshow/database.py
index 12b156a9..9d3315d4 100644
--- a/lightshow/database.py
+++ b/lightshow/database.py
@@ -34,7 +34,7 @@ def from_files_molecule(
         cls,
         root,
         filename="*.xyz",
-        lattice=[20.0, 20.0, 20.0],
+        lattice=None,
         pbar=True,
     ):
         """Searches for files matching the provided ``filename``, and assumes
@@ -58,6 +58,9 @@ def from_files_molecule(
         Database
         """
 
+        if lattice is None:
+            lattice = [20.0, 20.0, 20.0]
+
         structures = {}
         metadata = {}
         for key, path in enumerate(