If I edit them, I'll make more mistakes. I thought they would be useful to you, for ideas or work on your own scripts. As for variables-letters - yes, it is not readable, but when it is a complete function or library, what difference does it make? The main thing works. After all, when a programmer, for example, writing in C uses some library of functions in his work, he does not check its correctness, because it is considered ready. Now, if you Rex had written a universal library (or libraries) of functions for ROS containing functions for working with strings, arrays, time, sorting functions, transcoding into various encodings and formats, etc ... we would have erected a monument to you during your lifetime.
I think that such work is feasible only for a programmer of your level.