diff --git a/app/ds.py b/app/ds.py
index e7a1451..21bc389 100644
--- a/app/ds.py
+++ b/app/ds.py
@@ -44,8 +44,8 @@ from models import (
 
 # Configure the dogpile cache region
 cache_region = make_region().configure(
-    'dogpile.cache.memory',  # Use in-memory caching for now (switch to Redis if needed)
-    expiration_time=600  # Cache expires after 10 minutes
+    "dogpile.cache.memory",  # Use in-memory caching for now (switch to Redis if needed)
+    expiration_time=600,  # Cache expires after 10 minutes
 )
 
 
@@ -179,7 +179,9 @@ def notecolours_remove_colour_substring(text: str) -> str:
 
 # Track functions
 # @log_call
-def _tracks_where(query: BinaryExpression | ColumnElement[bool],) -> list[TrackDTO]:
+def _tracks_where(
+    query: BinaryExpression | ColumnElement[bool],
+) -> list[TrackDTO]:
     """
     filter_by_last_played: bool = False,
     last_played_before: dt.datetime | None = None,
@@ -435,9 +437,7 @@ def tracks_filtered(filter: Filter) -> list[TrackDTO]:
 
 
 # @log_call
-def track_update(
-    track_id: int, metadata: dict[str, str | int | float]
-) -> TrackDTO:
+def track_update(track_id: int, metadata: dict[str, str | int | float]) -> TrackDTO:
     """
     Update an existing track db entry return the DTO
     """
@@ -523,13 +523,17 @@ def _playlists_where(
     Return playlists selected by query
     """
 
-    stmt = select(
-        Playlists.favourite,
-        Playlists.is_template,
-        Playlists.id.label("playlist_id"),
-        Playlists.name,
-        Playlists.open,
-    ).where(query).order_by(Playlists.tab)
+    stmt = (
+        select(
+            Playlists.favourite,
+            Playlists.is_template,
+            Playlists.id.label("playlist_id"),
+            Playlists.name,
+            Playlists.open,
+        )
+        .where(query)
+        .order_by(Playlists.tab)
+    )
 
     results: list[PlaylistDTO] = []
 
@@ -597,7 +601,9 @@ def playlists_closed() -> list[PlaylistDTO]:
 
 
 # @log_call
-def playlist_create(name: str, template_id: int, as_template: bool = False) -> PlaylistDTO:
+def playlist_create(
+    name: str, template_id: int, as_template: bool = False
+) -> PlaylistDTO:
     """
     Create playlist and return DTO.
     """
@@ -676,9 +682,7 @@ def playlist_mark_status(playlist_id: int, open: bool) -> None:
 
     with db.Session() as session:
         session.execute(
-            update(Playlists)
-            .where(Playlists.id == playlist_id)
-            .values(open=open)
+            update(Playlists).where(Playlists.id == playlist_id).values(open=open)
         )
 
         session.commit()
@@ -791,9 +795,7 @@ def playlist_rename(playlist_id: int, new_name: str) -> None:
 
     with db.Session() as session:
         session.execute(
-            update(Playlists)
-            .where(Playlists.id == playlist_id)
-            .values(name=new_name)
+            update(Playlists).where(Playlists.id == playlist_id).values(name=new_name)
         )
 
         session.commit()
@@ -919,11 +921,9 @@ def playlist_save_tabs(playlist_id_to_tab: dict[int, int]) -> None:
             .where(Playlists.id.in_(playlist_id_to_tab.keys()))
             .values(tab=None)
         )
-        for (playlist_id, tab) in playlist_id_to_tab.items():
+        for playlist_id, tab in playlist_id_to_tab.items():
             session.execute(
-                update(Playlists)
-                .where(Playlists.id == playlist_id)
-                .values(tab=tab)
+                update(Playlists).where(Playlists.id == playlist_id).values(tab=tab)
             )
         session.commit()
 
@@ -943,6 +943,7 @@ def playlist_update_template_favourite(template_id: int, favourite: bool) -> Non
 
 # Playlist Rows
 
+
 # @log_call
 def playlistrow_by_id(playlistrow_id: int) -> PlaylistRowDTO | None:
     """
@@ -951,7 +952,9 @@ def playlistrow_by_id(playlistrow_id: int) -> PlaylistRowDTO | None:
 
     with db.Session() as session:
         record = (
-            session.execute(select(PlaylistRows).where(PlaylistRows.id == playlistrow_id))
+            session.execute(
+                select(PlaylistRows).where(PlaylistRows.id == playlistrow_id)
+            )
             .scalars()
             .one_or_none()
         )
@@ -977,9 +980,7 @@ def playlistrow_by_id(playlistrow_id: int) -> PlaylistRowDTO | None:
 def playlistrows_by_playlist(
     playlist_id: int, check_playlist_itegrity: bool = True
 ) -> list[PlaylistRowDTO]:
-
     with db.Session() as session:
-
         # TODO: would be good to be confident at removing this
         if check_playlist_itegrity:
             _playlist_check_playlist(
@@ -994,7 +995,6 @@ def playlistrows_by_playlist(
 
         dto_list = []
         for record in records:
-
             track = None
             if record.track_id:
                 track = track_by_id(record.track_id)
@@ -1040,7 +1040,9 @@ def playlistrow_played(playlistrow_id: int, status: bool) -> None:
 
     with db.Session() as session:
         session.execute(
-            update(PlaylistRows).where(PlaylistRows.id == playlistrow_id).values(played=status)
+            update(PlaylistRows)
+            .where(PlaylistRows.id == playlistrow_id)
+            .values(played=status)
         )
         session.commit()
 
@@ -1096,10 +1098,7 @@ def playdates_between_dates(
         Playdates.lastplayed,
         Playdates.track_id,
         Playdates.track,
-    ).where(
-        Playdates.lastplayed >= start,
-        Playdates.lastplayed <= end
-    )
+    ).where(Playdates.lastplayed >= start, Playdates.lastplayed <= end)
 
     results: list[PlaydatesDTO] = []
 
@@ -1137,10 +1136,7 @@ def _queries_where(
     results: list[QueryDTO] = []
 
     with db.Session() as session:
-        records = session.scalars(
-            select(Queries)
-            .where(query)
-        ).all()
+        records = session.scalars(select(Queries).where(query)).all()
         for record in records:
             dto = QueryDTO(
                 favourite=record.favourite,
@@ -1273,4 +1269,3 @@ def db_name_get() -> str:
             dbname = session.bind.engine.url.database
             return dbname
     return Config.DB_NOT_FOUND
-