I think this works as intended.

shell.nix

@@ -1,21 +1,20 @@
 { pkgs ? import <nixpkgs> {} }:
   pkgs.mkShell {
     nativeBuildInputs = [
-      (pkgs.python310.withPackages(ps: with ps; [
+      (pkgs.python39.withPackages(ps: with ps; [
         ruamel-yaml 
         (
           buildPythonPackage rec {
             pname = "canvasapi";
-            version = "3.2.0";
+            version = "2.2.0";
             src = fetchPypi {
               inherit pname version;
-              sha256 = "7cf97ad1ddc860e250c3453e229897ed1273095ad061c34baf651bf1b0e5a9c7";
+              sha256 = "5087db773cac9d92f4f4609b3c160dbeeceb636801421808afee2d438bc43f62";
             };
             doCheck = false;
             propagatedBuildInputs = [
-              pkgs.python3Packages.arrow
-              pkgs.python3Packages.pytz
-	            pkgs.python3Packages.requests
+              pkgs.python39Packages.pytz
+              pkgs.python39Packages.requests
             ];
           }
         )

staffeli_nt/__main__.py

@@ -29,10 +29,10 @@ def main():
         print(f'Error: Missing Canvas token at {path_token}.')
         sys.exit(0)
 
-    api_key = 'https://absalon.ku.dk/'
+    api_url = 'https://absalon.ku.dk/'
 
     with open(path_token, 'r') as f:
-        api_url = f.read().strip()
+        api_key = f.read().strip()
 
     args = parser.parse_args()
     if not hasattr(args, 'main'):

staffeli_nt/download.py

@@ -49,9 +49,9 @@ def add_subparser(subparsers: argparse._SubParsersAction):
     parser.add_argument('course_id', type=str, metavar='INT', help='the course id')
     parser.add_argument('path_template', type=str, metavar='TEMPLATE_PATH', help='path to the YAML template')
     parser.add_argument('path_destination', type=str, metavar='SUBMISSIONS_PATH', help='destination to submissions folder')
-    parser.add_argument('--select-section', action='store_false', help='whether section selection is used')
+    parser.add_argument('--select-section', action='store_true', help='whether section selection is used')
     parser.add_argument('--select-ta', type=str, metavar='PATH', help='path to a YAML file with TA distributions')
-    parser.add_argument('--resub', action='store_false', help='whether only resubmissions should be fetched')
+    parser.add_argument('--resub', action='store_true', help='whether only resubmissions should be fetched')
     parser.set_defaults(main=main)
 
 
@@ -61,7 +61,6 @@ def main(api_url, api_key, args: argparse.Namespace):
     path_destination = args.path_destination
     select_section = args.select_section
     select_ta = args.select_ta # use --select-ta file.yaml
-
     resubmissions_only = args.resub
 
     # sanity check
@@ -148,7 +147,7 @@ def main(api_url, api_key, args: argparse.Namespace):
             # NOTE: This is a terribly hacky solution and should really be rewritten
             # collect which attachments to download
             # if only fetching resubmissions
-            if  resubmissions_only:
+            if resubmissions_only:
                 if hasattr(submission, 'score'):
                     print(f'Score: {submission.score}')
                     # If a submission has not yet been graded, submission.score will be None

staffeli_nt/info.py

@@ -250,10 +250,10 @@ def get_course(api_url, api_key, course_id):
 def add_subparser(subparsers: argparse._SubParsersAction):
     parser : argparse.ArgumentParser = subparsers.add_parser(name='info', help='fetch infomation related to a course')
     parser.add_argument('course_id', type=str, metavar='INT', help='the course id')
-    parser.add_argument('--quiet', action='store_false', help='disable verbose output')
-    parser.add_argument('--debug', action='store_false', help='enable debug printing')
+    parser.add_argument('--quiet', action='store_true', help='disable verbose output')
+    parser.add_argument('--debug', action='store_true', help='enable debug printing')
     parser.add_argument('--get-ass-dist', metavar='PATH', help=("select an assignment and construct a distribution between available TA's, resulting in a YAML-file suitable for using with the --select-ta flag in download subcommand where the result will be written to PATH"))
-    parser.add_argument('--ids', action='store_false', help='print kuids and names for a sections')
+    parser.add_argument('--ids', action='store_true', help='print kuids and names for a sections')
     parser.set_defaults(main=main)
 
 

staffeli_nt/upload.py

@@ -60,10 +60,10 @@ def add_subparser(subparsers: argparse._SubParsersAction):
     parser : argparse.ArgumentParser = subparsers.add_parser(name='upload', help='upload feedback for submissions')
     parser.add_argument('path_template', type=str, metavar='TEMPLATE_PATH', help='path to the YAML template')
     parser.add_argument('path_submissions', type=str, metavar='SUBMISSIONS_PATH', help='destination to submissions folder')
-    parser.add_argument('--live', action='store_false', help='upload all feedback for submissions in the directory')
-    parser.add_argument('--step', action='store_false', help='to review all feedback for submissions in the directory')
-    parser.add_argument('--warn-missing', action='store_false', help='warn if grades are missing')
-    parser.add_argument('--write-local', action='store_false', help='writes the feedback locally unless --live is given')
+    parser.add_argument('--live', action='store_true', help='upload all feedback for submissions in the directory')
+    parser.add_argument('--step', action='store_true', help='to review all feedback for submissions in the directory')
+    parser.add_argument('--warn-missing', action='store_true', help='warn if grades are missing')
+    parser.add_argument('--write-local', action='store_true', help='writes the feedback locally unless --live is given')
     parser.set_defaults(main=main)
 
 def main(api_url, api_key, args: argparse.Namespace):

staffeli_nt/upload_single.py

@@ -33,7 +33,7 @@ def add_subparser(subparsers: argparse._SubParsersAction):
     parser.add_argument('path_meta_yml', type=str, metavar='META_PATH', help='YAML file containg meta data related to the submission')
     parser.add_argument('path_grade_yml', type=str, metavar='GRADE_PATH', help='YAML file containing the grade')
     parser.add_argument('path_feedback', type=str, metavar='FEEDBACK_PATH', help='the path to the text file containing feedback')
-    parser.add_argument('--live', action='store_false', help='upload feedback for submission')
+    parser.add_argument('--live', action='store_true', help='upload feedback for submission')
     parser.set_defaults(main=main)