Issue #4612 - add checks for error return types

cudart.cudaMemcpyAsync and cudart.cudaStreamSynchronize return a tuple
which leads to AttributeError as cudart.cudaGetErrorString(err) expects
a cudaError_t. This is solved by adding type check before passing it to
the raise function.

Signed-off-by: Gr0ly <[email protected]>

Author: grolysaini

quickstart/IntroNotebooks/onnx_helper.py

@@ -86,6 +86,7 @@ def predict(self, batch):  # result gets copied into output
         err = cudart.cudaMemcpyAsync(
             self.d_input, batch.ctypes.data, batch.nbytes, cudart.cudaMemcpyKind.cudaMemcpyHostToDevice, self.stream
         )
+        err = err[0] if isinstance(err, tuple) else err
         if err != cudart.cudaError_t.cudaSuccess:
             raise RuntimeError(f"Failed to copy input to device: {cudart.cudaGetErrorString(err)}")
 
@@ -100,11 +101,13 @@ def predict(self, batch):  # result gets copied into output
             cudart.cudaMemcpyKind.cudaMemcpyDeviceToHost,
             self.stream,
         )
+        err = err[0] if isinstance(err, tuple) else err
         if err != cudart.cudaError_t.cudaSuccess:
             raise RuntimeError(f"Failed to copy output from device: {cudart.cudaGetErrorString(err)}")
 
         # synchronize threads
         err = cudart.cudaStreamSynchronize(self.stream)
+        err = err[0] if isinstance(err, tuple) else err
         if err != cudart.cudaError_t.cudaSuccess:
             raise RuntimeError(f"Failed to synchronize stream: {cudart.cudaGetErrorString(err)}")