From e5d3427a5282a817c5b91478e39ac17871827fe5 Mon Sep 17 00:00:00 2001
From: Glenn Jocher <glenn.jocher@ultralytics.com>
Date: Sat, 5 Oct 2024 00:15:48 +0200
Subject: [PATCH] Zero mAP warning on YAML val (#16698)

---
 ultralytics/engine/validator.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/ultralytics/engine/validator.py b/ultralytics/engine/validator.py
index 5e0f0988c5..ff04a85135 100644
--- a/ultralytics/engine/validator.py
+++ b/ultralytics/engine/validator.py
@@ -119,6 +119,8 @@ class BaseValidator:
             self.args.plots &= trainer.stopper.possible_stop or (trainer.epoch == trainer.epochs - 1)
             model.eval()
         else:
+            if Path(self.args.model).suffix == ".yaml":
+                LOGGER.warning("WARNING ⚠️ validating an untrained model YAML will result in 0 mAP.")
             callbacks.add_integration_callbacks(self)
             model = AutoBackend(
                 weights=model or self.args.model,