Update calendar_app.py

calendar_app.py

@@ -33,10 +33,10 @@ class Calendar:
 
     def add_daterange(self, date_start, date_end, reminder):
         """Add a reminder for a date range."""
-        for date in range(date_start, date_end+1):
-            if date not in self.reminders:
-                self.reminders[date] = []
-            self.reminders[date].append(reminder)
+        for date in range(date_start, int(date_end)+1):
+            if str(date) not in self.reminders:
+                self.reminders[str(date)] = []
+            self.reminders[str(date)].append(reminder)
         self.save_calendar()
         print(f"Reminder added from {date_start} to {date_end} (inclusive of start and end dates): {reminder}")