Python type stubs generator fails on contrib/cudaoptflow module

[asmorkalov]

System Information

Platform: CUDA
Python: 3.6+

Detailed description

typing_stubs_generation.nodes.type_node.TypeResolutionError: Failed to resolve "cv2" namespace against "None". Errors: 
[
'Failed to resolve "cv2.cuda" namespace against "cv2". 
Errors: [\'Failed to resolve "cv2.cuda.NvidiaOpticalFlow_1_0" class against "cv2". 
Errors: [\\\'Failed to resolve "cv2.cuda.NvidiaOpticalFlow_1_0.create" function against "cv2". 
Errors: [0]: Failed to resolve "perfPreset" argument: Failed to resolve "cuda_NvidiaOpticalFlow_1_0_NVIDIA_OF_PERF_LEVEL" exposed as "cuda_NvidiaOpticalFlow_1_0_NVIDIA_OF_PERF_LEVEL"\\\']\', 

\'Failed to resolve "cv2.cuda.NvidiaOpticalFlow_2_0" class against "cv2". 
Errors: [\\\'Failed to resolve "cv2.cuda.NvidiaOpticalFlow_2_0.create" function against "cv2". 
Errors: [0]: Failed to resolve "perfPreset" argument: Failed to resolve "cuda_NvidiaOpticalFlow_2_0_NVIDIA_OF_PERF_LEVEL" exposed as "cuda_NvidiaOpticalFlow_2_0_NVIDIA_OF_PERF_LEVEL", 
[1]: Failed to resolve "outputGridSize" argument: Failed to resolve "cuda_NvidiaOpticalFlow_2_0_NVIDIA_OF_OUTPUT_VECTOR_GRID_SIZE" exposed as "cuda_NvidiaOpticalFlow_2_0_NVIDIA_OF_OUTPUT_VECTOR_GRID_SIZE", 
[2]: Failed to resolve "hintGridSize" argument: Failed to resolve "cuda_NvidiaOpticalFlow_2_0_NVIDIA_OF_HINT_VECTOR_GRID_SIZE" exposed as "cuda_NvidiaOpticalFlow_2_0_NVIDIA_OF_HINT_VECTOR_GRID_SIZE", 
[3]: Failed to resolve "perfPreset" argument: Failed to resolve "cuda_NvidiaOpticalFlow_2_0_NVIDIA_OF_PERF_LEVEL" exposed as "cuda_NvidiaOpticalFlow_2_0_NVIDIA_OF_PERF_LEVEL", 
[4]: Failed to resolve "outputGridSize" argument: Failed to resolve "cuda_NvidiaOpticalFlow_2_0_NVIDIA_OF_OUTPUT_VECTOR_GRID_SIZE" exposed as "cuda_NvidiaOpticalFlow_2_0_NVIDIA_OF_OUTPUT_VECTOR_GRID_SIZE", 
[5]: Failed to resolve "hintGridSize" argument: Failed to resolve "cuda_NvidiaOpticalFlow_2_0_NVIDIA_OF_HINT_VECTOR_GRID_SIZE" exposed as "cuda_NvidiaOpticalFlow_2_0_NVIDIA_OF_HINT_VECTOR_GRID_SIZE"\\\']\']',

Steps to reproduce

cmake -DBUILD_opencv_cudacodec=OFF -DPYTHON3_EXECUTABLE=which python3.8 -DPYTHON_DEFAULT_EXECUTABLE=which python3.8 -DWITH_CUDA=ON -DCUDA_ARCH_BIN=61 -DOPENCV_EXTRA_MODULES_PATH=../opencv_contrib/modules/ ../opencv-master

Issue submission checklist

• I report the issue, it's not a question
• I checked the problem with documentation, FAQ, open issues, forum.opencv.org, Stack Overflow, etc and have not found any solution
• I updated to the latest OpenCV version and the issue is still there
• There is reproducer code and related data files (videos, images, onnx, etc)