opencv 3.4.10/ efficientnet/ Yolo v3

[weiwei-liu]

I am trying to interpret a model with EfficientNet as backbone for Yolo v3 Detector.

I got this error:
cv2.error: OpenCV(4.2.0) /io/opencv/modules/dnn/src/darknet/darknet_io.cpp:686: error: (-212:Parsing error) Unsupported activation: smish in function 'ReadDarknetFromCfgStream'

The activations and functions like add grouped convolutions, sigmoid, swish, scale_channels are also added to opencv and These feature merged to opencv:3.4.

My Question is:

How can I pip install opencv-python with opencv 3.4.10 instead of opencv 4.2.0?

[skvark]

3.4.10 and 4.3.0 releases are currently blocked, for more info:

• Version 4.3.0 not available on pypi #316
• Linux wheels: manylinux2014 tracking issue #309