skip for old pytorch versions

Author: Devjiu

bitsandbytes/__init__.py

@@ -34,8 +34,10 @@
 if torch.cuda.is_available():
     from .backends.cuda import ops as cuda_ops
 
-if torch.xpu.is_available():
-    from .backends.xpu import ops as xpu_ops
+# xpu was introduced in PyTorch 2.3
+if torch.__version__ >= (2, 3):
+    if torch.xpu.is_available():
+        from .backends.xpu import ops as xpu_ops
 
 
 def _import_backends():