Download your Brightspace grades to an Excel spreadsheet. No more copying and pasting and checking and re-checking. It's a bit of a Rube Goldberg machine, but it works.
Just fill in your Brightspace username and password in brightspace.js.
Run pip -r requirements.txt
Run npm install .
Run node brightspace.js; python brightspace.py
After that, you will see a file called Brightspace_grades.xlsx in this directory. Open it, and the file will contain your marks for all of your courses, with each course in a seperate workbook.