The python script will give you some usage information if you just run it: python email_based_scores_to_canvas.py
You may find it helpful to set environment variables for your CANVAS_KEY (see https://canvas.instructure.com/doc/api/file.oauth.html#manual-token-generation) and CANVAS_URL (e.g. https://canvas.jmu.edu/)
In Canvas, go to your assignment page, e.g. a URL like https://canvas.jmu.edu/courses/1700404/assignments/11413662
The 2 integers in the URL are the course_id and assignment_id respectively. You need them in the following:
python email_based_scores_to_canvas.py course_id assignment_id scores.csv
so for the example it would be:
python email_based_scores_to_canvas.py 1700404 11413662 scores.csv
This will only print the data as it would be submitted to Canvas. You must pass --wet_run (as in not a dry run, the default) to actually have the scores sent to canvas.
Output from a= successful run would look something like
OK! RESPONSE:
{"id":4310251,"context_id":1700404,"context_type":"Course","user_id":null,"tag":"submissions_update","completion":null,"workflow_state":"queued","created_at":"2020-01-07T05:27:13Z","updated_at":"2020-01-07T05:27:13Z","message":null,"url":"https://canvas.jmu.edu/api/v1/progress/4310251"}