From 21a81af35471e34ede79e0beb986125db3f0f604 Mon Sep 17 00:00:00 2001
From: Dennis Lawler <4824647+drawlerr@users.noreply.github.com>
Date: Tue, 3 Mar 2020 03:50:23 -0700
Subject: [PATCH] Fix exception on invocation with no args (#200)

---
 night_rally/admin.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/night_rally/admin.py b/night_rally/admin.py
index 3293b97d75bc2..aa639baeed512 100644
--- a/night_rally/admin.py
+++ b/night_rally/admin.py
@@ -291,6 +291,9 @@ def valid_date(v):
         title="subcommands",
         dest="subcommand",
         help="")
+    # the keyword argument in #add_subparsers() only works in Python 3.7+.
+    # See https://docs.python.org/3.7/library/argparse.html#argparse.ArgumentParser.add_subparsers
+    subparsers.required = True
 
     # list races --max-results=20
     # list annotations --max-results=20