Use Ruff for linting and fix a ton of issues

novelwriter/core/buildsettings.py

@@ -294,12 +294,12 @@ class BuildSettings:
     def getInt(self, key: str) -> int:
         """Type safe value access for integers."""
         value = self._settings.get(key, SETTINGS_TEMPLATE.get(key, (None, None))[1])
-        return int(value) if isinstance(value, (int, float)) else 0
+        return int(value) if isinstance(value, int | float) else 0
 
     def getFloat(self, key: str) -> float:
         """Type safe value access for floats."""
         value = self._settings.get(key, SETTINGS_TEMPLATE.get(key, (None, None))[1])
-        return float(value) if isinstance(value, (int, float)) else 0.0
+        return float(value) if isinstance(value, int | float) else 0.0
 
     ##
     #  Setters

novelwriter/core/coretools.py

@@ -379,7 +379,7 @@ class ProjectBuilder:
         """Build or copy a project from a data dictionary."""
         if isinstance(data, dict):
             path = data.get("path", None) or None
-            if isinstance(path, (str, Path)):
+            if isinstance(path, str | Path):
                 self._path = Path(path).resolve()
                 if data.get("sample", False):
                     return self._extractSampleProject(self._path)
@@ -509,7 +509,7 @@ class ProjectBuilder:
 
         # Also add the archive and trash folders
         project.newRoot(nwItemClass.ARCHIVE)
-        project.tree.trash  # Triggers the creation of Trash
+        _ = project.tree.trash  # Triggers the creation of Trash
 
         project.saveProject()
         project.closeProject()

novelwriter/core/docbuild.py

@@ -316,13 +316,13 @@ class NWBuildDocument:
             bldObj.setStyles(self._build.getBool("html.addStyles"))
             bldObj.setReplaceUnicode(self._build.getBool("format.stripUnicode"))
 
-        if isinstance(bldObj, (ToOdt, ToDocX)):
+        if isinstance(bldObj, ToOdt | ToDocX):
             bldObj.setHeaderFormat(
                 self._build.getStr("doc.pageHeader"),
                 self._build.getInt("doc.pageCountOffset"),
             )
 
-        if isinstance(bldObj, (ToOdt, ToDocX, ToQTextDocument)):
+        if isinstance(bldObj, ToOdt | ToDocX | ToQTextDocument):
             scale = nwLabels.UNIT_SCALE.get(self._build.getStr("format.pageUnit"), 1.0)
             pW, pH = nwLabels.PAPER_SIZE.get(self._build.getStr("format.pageSize"), (-1.0, -1.0))
             bldObj.setPageLayout(

novelwriter/core/itemmodel.py

@@ -333,8 +333,9 @@ class ProjectModel(QAbstractItemModel):
             return self.createIndex(parent.row(), 0, parent)
         return QModelIndex()
 
-    def index(self, row: int, column: int, parent: QModelIndex = QModelIndex()) -> QModelIndex:
+    def index(self, row: int, column: int, parent: QModelIndex | None = None) -> QModelIndex:
         """Get the index of a child item of a parent."""
+        parent = parent or QModelIndex()
         if self.hasIndex(row, column, parent):
             node: ProjectNode = parent.internalPointer() if parent.isValid() else self._root
             if child := node.child(row):