Here are some of my thoughts about my question.
Trying to use skipping the program_target() to solve KeyError ‘flash’ will result in my question 2.
However, this way can deal with KeyError ‘flash’ during running another tutorials in jupyter/courses/fault101 instead of in jupyter/archive.
The hardware I used may be different from the hardware in the tutorial, but I confused about there are PLATFORM = ‘CWLITEXMEGA’ in those tutorials.