Modify the import on the observer.

Author: isazi

kernel_tuner/backends/nvcuda.py

@@ -13,7 +13,7 @@
 try:
     from cuda.bindings import driver, runtime, nvrtc
 except ImportError:
-    driver = None
+    cuda = None
 
 
 class CudaFunctions(GPUBackend):
@@ -39,7 +39,7 @@ def __init__(self, device=0, iterations=7, compiler_options=None, observers=None
         """
         self.allocations = []
         self.texrefs = []
-        if not driver:
+        if not cuda:
             raise ImportError(
                 "cuda-python not installed, install using 'pip install cuda-python', or check https://kerneltuner.github.io/kernel_tuner/stable/install.html#cuda-and-pycuda."
             )

kernel_tuner/observers/nvcuda.py

@@ -1,12 +1,12 @@
 import numpy as np
 
 try:
-    from cuda import cudart
+    from cuda.bindings import cudart
 except ImportError:
     cuda = None
 
 from kernel_tuner.observers.observer import BenchmarkObserver
-from kernel_tuner.util import cuda_error_check
+from kernel_tuner.utils.nvcuda import cuda_error_check
 
 
 class CudaRuntimeObserver(BenchmarkObserver):