From 6b18346f586a0f2933d0334fb8eb960014a7f17c Mon Sep 17 00:00:00 2001
From: Chris Jones <50423140+chrisjonesBSU@users.noreply.github.com>
Date: Fri, 21 Jun 2024 15:31:03 -0600
Subject: [PATCH] Fix hoomd version handling in `convert_hoomd.py` (#828)

* move hoomd version var under if statement

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---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
---
 gmso/external/convert_hoomd.py | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/gmso/external/convert_hoomd.py b/gmso/external/convert_hoomd.py
index 6779dafe..1eb7b8ce 100644
--- a/gmso/external/convert_hoomd.py
+++ b/gmso/external/convert_hoomd.py
@@ -31,6 +31,10 @@
 if has_hoomd:
     import hoomd
 
+    hoomd_version = hoomd.version.version.split(".")
+else:
+    hoomd_version = None
+
 # Note, charge will always be assumed to be in elementary_charge
 MD_UNITS = {
     "energy": u.kJ / u.mol,
@@ -44,8 +48,6 @@
     "mass": u.g / u.mol,  # aka amu
 }
 
-hoomd_version = hoomd.version.version.split(".")
-
 
 def to_gsd_snapshot(
     top,