From 755484c5798e0d41bd225a2978e57b4dec171cab Mon Sep 17 00:00:00 2001
From: Varun Agrawal <varagrawal@gmail.com>
Date: Wed, 27 Oct 2021 10:01:50 -0400
Subject: [PATCH] fix small bug

---
 python/gtsam/examples/ImuFactorExample.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/python/gtsam/examples/ImuFactorExample.py b/python/gtsam/examples/ImuFactorExample.py
index dda0638a1..5b4b06b55 100644
--- a/python/gtsam/examples/ImuFactorExample.py
+++ b/python/gtsam/examples/ImuFactorExample.py
@@ -31,7 +31,7 @@ BIAS_KEY = B(0)
 np.set_printoptions(precision=3, suppress=True)
 
 
-def parse_args():
+def parse_args() -> argparse.Namespace:
     """Parse command line arguments."""
     parser = argparse.ArgumentParser("ImuFactorExample.py")
     parser.add_argument("--twist_scenario",
@@ -48,6 +48,7 @@ def parse_args():
                         action='store_true')
     parser.add_argument("--verbose", default=False, action='store_true')
     args = parser.parse_args()
+    return args
 
 
 class ImuFactorExample(PreintegrationExample):