Python argument types did not match C++ signature

[love1323]

Hello,
when I run handpose.py met

Traceback (most recent call last):
File "handpose.py", line 214, in
mono_hand_loop(acq, (640,480), config, track=True, with_renderer=True)
File "handpose.py", line 113, in mono_hand_loop
rgbKp = IK.Observations(IK.ObservationType.COLOR, clb, keypoints)
Boost.Python.ArgumentError: Python argument types in
Observations.init(Observations, ObservationType, CameraMeta, numpy.ndarray)
did not match C++ signature:
init(_object*, ObservationType, MBV::Core::CameraMeta, cv::Mat, float, int)
init(_object*, ObservationType, MBV::Core::CameraMeta, cv::Mat)
init(_object*)
init(_object*)

my environment:
python 3.5
numpy 1.16
opencv-python 3.4.3

[padeler]

It looks like the issue is on the boost python defined type conversions. Have you imported PyMBVCore in your script?