Setup LSP and clear all lint

main.py

@@ -9,56 +9,22 @@
 import os
 import re
 import sys
-from datetime import datetime, timedelta
 from typing import Optional
 
-from PyQt6.QtCore import (
-    QCoreApplication,
-    QEvent,
-    QModelIndex,
-    QResource,
-    Qt,
-    QTimer,
-    pyqtSignal,
-    pyqtSlot,
-)
-from PyQt6.QtGui import (
-    QAction,
-    QFont,
-    QTextCharFormat,
-    QTextCursor,
-    QTextDocument,
-    QTextListFormat,
-)
+from PyQt6.QtCore import (QCoreApplication, QEvent, QModelIndex, QResource,
+                          pyqtSignal, pyqtSlot)
 from PyQt6.QtSql import QSqlDatabase, QSqlQuery, QSqlQueryModel
-from PyQt6.QtWidgets import (
-    QApplication,
-    QFileDialog,
-    QMainWindow,
-    QMessageBox,
-    QPushButton,
-)
+from PyQt6.QtWidgets import QApplication, QFileDialog, QMainWindow
+
 
-from lib import *
 from lib.preferences import Preferences
+from lib import PersonDialog, Book, SessionDialog, ReadDialog, query_error
+
 from ui.MainWindow import Ui_MainWindow
 
 translate = QCoreApplication.translate
 
 
-def query_error(query: QSqlQuery) -> None:
-    print(
-        translate("MainWindow", "SQL Error:\n")
-        + "{}\n{}\n{}:{}".format(
-            query.executedQuery(),
-            query.boundValues(),
-            query.lastError().type(),
-            query.lastError().text(),
-        )
-    )
-    raise Exception(translate("MainWindow", "SQL Error"))
-
-
 class MainWindow(QMainWindow, Ui_MainWindow):
     def __init__(self) -> None:
         super(MainWindow, self).__init__()
@@ -97,7 +63,6 @@ class MainWindow(QMainWindow, Ui_MainWindow):
 
     @pyqtSlot(QModelIndex)
     def selectedPerson(self, index: QModelIndex) -> None:
-        person_id = index.siblingAtColumn(0).data()
         self.actionEditPerson.setEnabled(True)
         book_id = index.siblingAtColumn(3).data()
         if not book_id or book_id < 0:
@@ -324,7 +289,7 @@ def main() -> int:
         )
     schema_update(db)
     Preferences()
-    window: QMainWindow = MainWindow()
+    window = MainWindow()  # noqa: F841
     return app.exec()