When running the program, paste the grading comments into the console, and press the Enter key once or twice
Examples:
add_grades(25, ec=1, q_num=14)
get result 21.62
add_grades(7, ec=0, index=[1,'2a','2b', 3])
ger result 6.25
add_grades(6, ec=2, index=['Part1-1', '2', 'Part2', 'Part3', 'ec'])
get result 5.0
