use ignite for exp2

gpu_utils.py

@@ -0,0 +1,17 @@
+import torch
+
+
+def print_gpu_availability():
+    """打印PyTorch的GPU可用性"""
+    if torch.cuda.is_available():
+        print(f"GPU可用：{torch.cuda.get_device_name(0)}")
+    else:
+        print("GPU不可用")
+
+
+def get_gpu_device() -> torch.device:
+    """获取PyTorch的GPU设备"""
+    if torch.cuda.is_available():
+        return torch.device("cuda")
+    else:
+        raise Exception("找不到CUDA！")