I watched the talk by Nina Zakharenko at https://www.youtube.com/watch?v=35mXD40SvXM.  Since I love being able to save, compile, and run a file with one keystroke, I appreciate people wanting to do the equivalent with CircuitExpress and Adafruit.  In IDLE, print() output would appear in IDLE's Shell unless sys.stdout were replaced.

Dan's note suggests that flush/fsynch would be more generally useful than for the board.  I am inclined to add try: except: around the calls, and perhaps display a message "File was not saved" + traceback.

Dan, slightly OT, but I am curious whether one can access USB ports (in a system-dependent manner) directly from python code via os.system and ctypes?