chore: fix imports on windows

Author: cpcloud

cuda_bindings/tests/test_cufile.py

@@ -14,7 +14,6 @@
 
 import cuda.bindings.driver as cuda
 import pytest
-from cuda.bindings.cufile import cuFileError
 
 # Configure logging to show INFO level and above
 logging.basicConfig(
@@ -26,7 +25,9 @@
 try:
     from cuda.bindings import cufile
 except ImportError:
-    cufile = None
+    cufile = cuFileError = None
+else:
+    from cuda.bindings.cufile import cuFileError
 
 
 def platform_is_wsl():