Add event argument

main.py

@@ -1,9 +1,11 @@
 import argparse
 
-def main(day: int, test: bool = False) -> str:
+FIRST_EVENT = 2015
+LAST_EVENT = 2015
+
+def main(day: int, event: int, test: bool = False) -> str:
     print("Called main...")
-    print("Day is: {}".format(day))
-    print("Testing: {}".format(test))
+    return f"Day {day} of event {event} processing [Test: {test}]"
 
 
 if __name__ == "__main__":
@@ -15,9 +17,15 @@ if __name__ == "__main__":
         "-d",
         "--day",
         type=int,
-        choices=range(1, 25),
+        choices=range(1, 26),
         help="Integer day number to solve for (1-25)."
     )
+    parser.add_argument(
+        "-e",
+        "--event",
+        type=int,
+        choices=range(FIRST_EVENT, LAST_EVENT + 1)
+    )
     args = parser.parse_args()
 
-    main(day=args.day, test=args.test)
+    print(main(day=args.day, event=args.event, test=args.test))