Take the Course Survey (link here) ASAP, as I need the information to release your first homework and project.
Be sure to read the Syllabus (see the left Nav-Bar). Minor correction to video: Homeworks are due on THURSDAYS, not Tuesdays.
Rather than writing programs to handle each of these file formats, you should strongly consider looking into libraries that can manage them for you. Specifically, the python modules here: