It looks like this problem is caused by ROS adding /opt/ros/kinetic/lib/python2.7/dist-packages to the python path. This actually happens when you activate ROS with the command source /opt/ros/kinetic/setup.bash. This line is often added at the end of your bashrc file, in /home/username/.bashrc. A workaround is to remove this line from the bashrc file. This way the … Read more
This is an old trick to avoid problems with implicit conversions to bool from before explicit contextual conversions were introduced in C++11. It’s intended to be used to check validity: Subscriber my_subscriber = someFunction(); if (!my_subscriber) { // error case } The important point is that no built-in conversion exists from void* to integer types, … Read more
You need to update your repository targets to the Focal Fossa (20.04) release of Ubuntu. This can be done like so: sudo sed -i -e ‘s|disco|focal|g’ /etc/apt/sources.list sudo apt update