Did some memory optimisation, moved some files and created a completely not tested gui class that will list an artist's tracks.

Made tracks return an already existing object when they get created with a path of an already existing track object.

wobuzz/ui/library/artist_view.py

@@ -0,0 +1,42 @@
+#!/usr/bin/python3
+
+from PyQt6.QtWidgets import QTreeWidget, QAbstractItemView
+
+from ..playlist_view import PlaylistView
+
+
+class ArtistView(PlaylistView):
+    def __init__(self, playlist, library_widget, parent=None):
+        QTreeWidget.__init__(self, parent)
+
+        self.playlist = playlist
+        self.library_widget = library_widget
+
+        self.app = playlist.app
+
+        self.header = self.header()
+        self.header.setSectionsClickable(True)
+        self.header.setSortIndicatorShown(True)
+
+        playlist.views[id(self.library_widget)] = self  # let the playlist know that this view exists
+
+        self.setSelectionMode(QAbstractItemView.SelectionMode.ExtendedSelection)
+
+        self.setColumnCount(3)
+
+        headers = [
+            "#",
+            "Title",
+            "Artist",
+            "Album",
+        ]
+
+        self.setHeaderLabels(headers)
+
+        self.itemActivated.connect(self.on_track_activation)
+        self.header.sectionClicked.connect(self.on_header_click)
+        self.sort_signal.connect(self.sortItems)
+
+    def setDragDropMode(self, behavior):
+        pass  # user should not be able to sort the playlist manually
+