ImportError: dynamic module does not define module export function (PyInit_cv_bridge_boost)

The reason lies in the CV of ROS_ Bridge only supports python2. If you want to use python3, you need to compile CV by yourself_ Bridge bag. My environment: Ubuntu 18.04 + ROS + Python 3.6 (anaconda3 is installed, but Python 3.6 is used)
refer to the first answer in the link for specific steps (like more answers):

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