tidy db resource close

common.py

@@ -110,6 +110,13 @@ def unmark_user_posted(bot_name, user_id):
 
     return cursor.rowcount > 0  # Returns True if a row was deleted
 
+def db_close():
+    try:
+        cursor.close()
+        conn.close()
+    except Exception:
+        pass
+
 
 # It is not safe to get notifications from "last_id" because some may have been deleted
 def get_new_notifications(api, bot_name, types=None):

feditree.py

@@ -1,7 +1,7 @@
 
 from dotenv import load_dotenv
 from PIL import Image, ImageFile
-from common import get_api, get_new_notifications, list_read, list_append, has_user_posted, mark_user_posted, unmark_user_posted
+from common import get_api, get_new_notifications, has_user_posted, mark_user_posted, unmark_user_posted, db_close
 import datetime
 import gettext
 import requests
@@ -158,3 +158,5 @@ if os.path.exists(temp_image_name):
         os.remove(temp_image_name)
     except Exception:
         pass
+
+db_close()