Super useful, in fact. A lot of the code I write follows a typical pattern of bottleneck code in C++ with python wrappers, or a mixture of pure python nodes (fo

Super useful, in fact. A lot of the code I write follows a typical pattern of bottleneck code in C++ with python wrappers, or a mixture of pure python nodes (for the things that don't have to be super fast) and pure C++ nodes. This is fairly common throughout ROS. If catkin played better with current Python packaging and virtual environment systems (virtualenv/conda) it would be so much better, though.