From 6e43ccf32bb2ce7abce14ebf7e5bda7fbb497188 Mon Sep 17 00:00:00 2001
From: Glen Hocky <gmh4@log-1.nyu.cluster>
Date: Wed, 27 Jan 2021 19:41:24 -0500
Subject: [PATCH] Fixed bug in get_thermo_data where columns is set to None
 instead of an empty list

---
 python/lammps/pylammps.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/python/lammps/pylammps.py b/python/lammps/pylammps.py
index 1ec45d43b5..47a2a5a6ab 100644
--- a/python/lammps/pylammps.py
+++ b/python/lammps/pylammps.py
@@ -329,7 +329,7 @@ def get_thermo_data(output):
 
         elif line.startswith("Loop time of "):
             in_run = False
-            columns = None
+            columns = []
             thermo_data = variable_set('ThermoData', current_run)
             r = {'thermo' : thermo_data }
             runs.append(namedtuple('Run', list(r.keys()))(*list(r.values())))