handle none value for the subcommand parser (#2276)

NVIDIA · Jan 12, 2024 · c806e1e · c806e1e
1 parent 6bd1ed5
commit c806e1e
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/nvflare/cli.py b/nvflare/cli.py
@@ -143,7 +143,8 @@ def parse_args(prog_name: str):
     if argv:
         msg = f"{prog_name} {cmd}: unrecognized arguments: {' '.join(argv)}\n"
         print(f"\nerror: {msg}")
-        sub_cmd_parser.print_help()
+        if sub_cmd_parser:
+            sub_cmd_parser.print_help()
         _parser.exit(2, "\n")
     return _parser, _parser.parse_args(), sub_cmd_parsers