Update csub.py

Author: alexdremov

csub.py

@@ -56,7 +56,7 @@ def build_parser() -> argparse.ArgumentParser:
     parser.add_argument("--secret-name", type=str, help="Override RUNAI_SECRET_NAME from the env file")
     parser.add_argument("--pvc", type=str, help="Override SCRATCH_PVC from the env file")
     parser.add_argument("--backofflimit", type=int, default=0, help="Retries before marking a training job as failed")
-    parser.add_argument("--node-type", nargs="*", type=str, choices=["", "v100", "h100", "h200", "default", "a100-40g"], default="", help="GPU node pool(s) to target. Multiple values are accepted; the job will be scheduled on the first pool where it fits")
+    parser.add_argument("--node-type", nargs="*", type=str, choices=["v100", "h100", "h200", "default", "a100-40g"], default=[], help="GPU node pool(s) to target. Multiple values are accepted; the job will be scheduled on the first pool where it fits")
     parser.add_argument("--host-ipc", action="store_true", help="Share the host IPC namespace")
     parser.add_argument("--large-shm", action="store_true", help="Request a larger /dev/shm")
     return parser