from ultralytics import YOLO

# 加载最佳模型
best_model = YOLO('runs/detect/yolov8n_pcb_defect_exp14/weights/best.pt')

# 在测试集上评估
metrics = best_model.val()  # 程序会自动计算mAP等指标
print(f"mAP@0.5: {metrics.box.map50}")
print(f"mAP@0.5:0.95: {metrics.box.map}")