Added comment at evaluator.py

miraculix/evaluator.py

@@ -106,6 +106,13 @@ class Evaluator:
     @staticmethod
     def is_grade_note(grade):
         """Check for special grade notes of RWTHOnline"""
+        """
+            B - Bestanden (Passed the exam)
+            X - Nicht erschienen (Did not attend)
+            NZ - Nicht zugelassen (Inadmissible for examination)
+            PA - Prüfung abgebrochen (Cancelled examination)
+            U - Ungültig/Täuschung (Invalid / Attempt to deceive)
+        """
         if grade == 'B' or grade == 'X' or grade == 'NZ' or grade == 'PA' or grade == 'U':
             return True
         else: