diff --git a/docs/source/conf.py b/docs/source/conf.py
index 3f6ca99..df82bd1 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -8,6 +8,7 @@
 
 import re
 import time
+from urllib.request import urlretrieve
 
 project = 'PyMonCtl'
 year = time.strftime("%Y")
@@ -42,8 +43,6 @@
 
 # -- Copy the modules documentation ------------------------------------------
 # https://stackoverflow.com/questions/66495200/is-it-possible-to-include-external-rst-files-in-my-documentation
-from urllib.request import urlretrieve
-
 urlretrieve(
     "https://raw.githubusercontent.com/kalmat/pymonctl/master/README.md",
     "index.md"
diff --git a/ruff.toml b/ruff.toml
index 6cbc1bb..3dc79f7 100644
--- a/ruff.toml
+++ b/ruff.toml
@@ -49,16 +49,6 @@ ignore = [
   # TODO: Consider later
   "UP031", # printf-string-formatting
   "RUF059", # unused-unpacked-variable
-
-  # TODO: Not autofixable, address in a separate PR !
-  "E402",
-  "E722",
-  "F401",
-  "PERF401",
-  "PYI063",
-  "RUF003",
-  "RUF012",
-  "RUF022",
 ]
 # F401 would remove imports not marked as explicit re-exports, which may break API boundaries
 extend-unsafe-fixes = ["F401"]
diff --git a/src/pymonctl/__init__.py b/src/pymonctl/__init__.py
index c8592b9..a017d27 100644
--- a/src/pymonctl/__init__.py
+++ b/src/pymonctl/__init__.py
@@ -1,6 +1,15 @@
 #!/usr/bin/python
 from importlib.metadata import version as _importlib_version
 
+from ._main import (getAllMonitors, getAllMonitorsDict, getMonitorsCount, getPrimary,
+                    findMonitorsAtPoint, findMonitorsAtPointInfo, findMonitorWithName, findMonitorWithNameInfo,
+                    saveSetup, restoreSetup, arrangeMonitors, getMousePos, Monitor,
+                    enableUpdateInfo, disableUpdateInfo, isUpdateInfoEnabled, isWatchdogEnabled, updateWatchdogInterval,
+                    plugListenerRegister, plugListenerUnregister, isPlugListenerRegistered,
+                    changeListenerRegister, changeListenerUnregister, isChangeListenerRegistered,
+                    DisplayMode, ScreenValue, Size, Point, Box, Rect, Position, Orientation
+                    )
+
 __all__ = [
     "getAllMonitors", "getAllMonitorsDict", "getMonitorsCount", "getPrimary",
     "findMonitorsAtPoint", "findMonitorsAtPointInfo", "findMonitorWithName", "findMonitorWithNameInfo",
@@ -19,11 +28,3 @@ def version(numberOnly: bool = True) -> str:
     return ("" if numberOnly else "PyMonCtl-")+__version__
 
 
-from ._main import (getAllMonitors, getAllMonitorsDict, getMonitorsCount, getPrimary,
-                    findMonitorsAtPoint, findMonitorsAtPointInfo, findMonitorWithName, findMonitorWithNameInfo,
-                    saveSetup, restoreSetup, arrangeMonitors, getMousePos, Monitor,
-                    enableUpdateInfo, disableUpdateInfo, isUpdateInfoEnabled, isWatchdogEnabled, updateWatchdogInterval,
-                    plugListenerRegister, plugListenerUnregister, isPlugListenerRegistered,
-                    changeListenerRegister, changeListenerUnregister, isChangeListenerRegistered,
-                    DisplayMode, ScreenValue, Size, Point, Box, Rect, Position, Orientation
-                    )
diff --git a/src/pymonctl/_main.py b/src/pymonctl/_main.py
index a4fdaa4..32f7844 100644
--- a/src/pymonctl/_main.py
+++ b/src/pymonctl/_main.py
@@ -212,11 +212,7 @@ def saveSetup() -> list[tuple[Monitor, ScreenValue]]:
 
     :return: list of tuples containing all necessary info to restore saved setup as required by restoreSetup()
     """
-    result: list[tuple[Monitor, ScreenValue]] = []
-    monDict: dict[str, ScreenValue] = getAllMonitorsDict()
-    for monName in monDict.keys():
-        result.append((Monitor(monDict[monName]["id"]), monDict[monName]))
-    return result
+    return [(Monitor(screenValue["id"]), screenValue) for screenValue in getAllMonitorsDict().values()]
 
 
 def restoreSetup(setup: list[tuple[Monitor, ScreenValue]]):
@@ -1002,18 +998,21 @@ def _getRelativePosition(monitor, relativeTo) -> tuple[int, int]:
     return x, y
 
 
+
 if sys.platform == "darwin":
     from ._pymonctl_macos import (_getAllMonitors, _getAllMonitorsDict, _getMonitorsCount, _getPrimary,
-                                  _findMonitor, _arrangeMonitors, _getMousePos as getMousePos, MacOSMonitor as Monitor
+                                  _findMonitor, _arrangeMonitors, _getMousePos, MacOSMonitor as Monitor
                                   )
 elif sys.platform == "win32":
     from ._pymonctl_win import (_getAllMonitors, _getAllMonitorsDict, _getMonitorsCount, _getPrimary,
-                                _findMonitor, _arrangeMonitors, _getMousePos as getMousePos, Win32Monitor as Monitor
+                                _findMonitor, _arrangeMonitors, _getMousePos, Win32Monitor as Monitor
                                 )
 elif sys.platform == "linux":
     from ._pymonctl_linux import (_getAllMonitors, _getAllMonitorsDict, _getAllMonitorsDictThread, _getMonitorsData,
-                                  _getMonitorsCount, _getPrimary, _findMonitor, _arrangeMonitors, _getMousePos as getMousePos,
+                                  _getMonitorsCount, _getPrimary, _findMonitor, _arrangeMonitors, _getMousePos,
                                   LinuxMonitor as Monitor
                                   )
 else:
     raise NotImplementedError('PyMonCtl currently does not support this platform. If you think you can help, please contribute! https://github.com/Kalmat/PyMonCtl')
+
+getMousePos = _getMousePos
diff --git a/src/pymonctl/_pymonctl_linux.py b/src/pymonctl/_pymonctl_linux.py
index 129ce2a..077222b 100644
--- a/src/pymonctl/_pymonctl_linux.py
+++ b/src/pymonctl/_pymonctl_linux.py
@@ -3,7 +3,8 @@
 
 import sys
 
-assert sys.platform == "linux"
+if sys.platform != "linux":
+    raise OSError(f"Cannot import {__name__} on {sys.platform}")
 
 import math
 import os
@@ -107,11 +108,11 @@ def _getMonitorsCount() -> int:
 
 
 def _findMonitor(x: int, y: int) -> list[LinuxMonitor]:
-    monitors = []
-    for monitor in _XgetMonitors():
-        if _pointInBox(x, y, monitor.x, monitor.y, monitor.width_in_pixels, monitor.height_in_pixels):
-            monitors.append(LinuxMonitor(monitor.crtcs[0]))
-    return monitors
+    return [
+        LinuxMonitor(monitor.crtcs[0])
+        for monitor in _XgetMonitors()
+        if _pointInBox(x, y, monitor.x, monitor.y, monitor.width_in_pixels, monitor.height_in_pixels)
+    ]
 
 
 def _getPrimary() -> LinuxMonitor:
@@ -377,9 +378,9 @@ def dpi(self) -> tuple[float, float] | None:
         monitors = _XgetMonitors(self.name)
         if monitors:
             monitor = monitors[0]
-            _x, _y, w, h = monitor.x, monitor.y, monitor.width_in_pixels, monitor.height_in_pixels
             if monitor.width_in_millimeters != 0 and monitor.height_in_millimeters != 0:
-                dpiX, dpiY = round((w * 25.4) / monitor.width_in_millimeters), round((h * 25.4) / monitor.height_in_millimeters)
+                dpiX = round((monitor.width_in_pixels * 25.4) / monitor.width_in_millimeters),
+                dpiY = round((monitor.height_in_pixels * 25.4) / monitor.height_in_millimeters)
             else:
                 dpiX, dpiY = 0.0, 0.0
             return dpiX, dpiY
@@ -1001,7 +1002,7 @@ def _XgetMonitorData(handle: int | None = None) -> tuple[Xlib.display.Display, S
     for monitorData in _XgetAllMonitors():
         display, screen, root, monitor, monName = monitorData
         output = monitor.crtcs[0]
-        if (handle and handle == output) or (not handle and monitor.primary == 1):
+        if (handle == output if handle else monitor.primary == 1):
             return display, screen, root, monitor, output, monName
     return None
 
diff --git a/src/pymonctl/_pymonctl_macos.py b/src/pymonctl/_pymonctl_macos.py
index d0c1ef8..2d75144 100644
--- a/src/pymonctl/_pymonctl_macos.py
+++ b/src/pymonctl/_pymonctl_macos.py
@@ -6,7 +6,9 @@
 import ctypes
 
 import sys
-assert sys.platform == "darwin"
+
+if sys.platform != "darwin":
+    raise OSError(f"Cannot import {__name__} on {sys.platform}")
 
 import subprocess
 import threading
@@ -22,11 +24,8 @@
 
 
 def _getAllMonitors() -> list[MacOSMonitor]:
-    monitors = []
     v, ids, cnt = CG.CGGetOnlineDisplayList(10, None, None)  # --> How to get display name from this?
-    for displayId in ids:
-        monitors.append(MacOSMonitor(displayId))
-    return monitors
+    return [MacOSMonitor(displayId) for displayId in ids]
 
 
 def _getAllMonitorsDict() -> dict[str, ScreenValue]:
@@ -617,7 +616,7 @@ def isOn(self) -> bool | None:
         return bool(CG.CGDisplayIsActive(self.handle) == 1)
 
     def suspend(self):
-        # Also injecting: Control–Shift–Media_Eject
+        # Also injecting: Control-Shift-Media_Eject
         cmd = "pmset displaysleepnow"
         try:
             _ = subprocess.run(cmd, text=True, shell=True, capture_output=True, timeout=1)
diff --git a/src/pymonctl/_pymonctl_win.py b/src/pymonctl/_pymonctl_win.py
index 4f1a873..58900a0 100644
--- a/src/pymonctl/_pymonctl_win.py
+++ b/src/pymonctl/_pymonctl_win.py
@@ -2,7 +2,9 @@
 from __future__ import annotations
 
 import sys
-assert sys.platform == "win32"
+
+if sys.platform != "win32":
+    raise OSError(f"Cannot import {__name__} on {sys.platform}")
 
 import gc
 import platform
@@ -849,8 +851,7 @@ class _PHYSICAL_MONITOR(ctypes.Structure):
         physical_array = (_PHYSICAL_MONITOR * count.value)()
         ret = ctypes.windll.dxva2.GetPhysicalMonitorsFromHMONITOR(hMon, count.value, physical_array)
         if ret:
-            for physical in physical_array:
-                handles.append(physical.handle)
+            handles.extend([physical.handle for physical in physical_array])
     return handles
 
 
diff --git a/src/pymonctl/_structs.py b/src/pymonctl/_structs.py
index 945d598..95be811 100644
--- a/src/pymonctl/_structs.py
+++ b/src/pymonctl/_structs.py
@@ -3,7 +3,7 @@
 
 import sys
 from enum import IntEnum
-from typing import NamedTuple, TypedDict
+from typing import ClassVar, NamedTuple, TypedDict
 
 
 class Box(NamedTuple):
@@ -111,14 +111,14 @@ class Orientation(IntEnum):
     # ==================================== PathsInfo
 
     class _DUMMYSTRUCTNAME(ctypes.Structure):
-        _fields_ = [
+        _fields_: ClassVar = [
             ('cloneGroupId', ctypes.c_uint32),
             ('sourceModeInfoIdx', ctypes.c_uint32)
         ]
 
 
     class _DUMMYUNIONNAME(ctypes.Union):
-        _fields_ = [
+        _fields_: ClassVar = [
             ('modeInfoIdx', ctypes.c_uint32),
             ('dummyStructName', _DUMMYSTRUCTNAME)
         ]
@@ -126,14 +126,14 @@ class _DUMMYUNIONNAME(ctypes.Union):
 
 
     class _LUID(ctypes.Structure):
-        _fields_ = [
+        _fields_: ClassVar = [
             ('lowPart', ctypes.wintypes.DWORD),
             ('highPart', ctypes.wintypes.LONG)
         ]
 
 
     class _DISPLAYCONFIG_PATH_SOURCE_INFO(ctypes.Structure):
-        _fields_ = [
+        _fields_: ClassVar = [
             ('adapterId', _LUID),
             ('id', ctypes.c_uint32),
             ('dummyUnionName', _DUMMYUNIONNAME),
@@ -142,14 +142,14 @@ class _DISPLAYCONFIG_PATH_SOURCE_INFO(ctypes.Structure):
 
 
     class _DISPLAYCONFIG_RATIONAL(ctypes.Structure):
-        _fields_ = [
+        _fields_: ClassVar = [
             ('numerator', ctypes.c_uint32),
             ('denominator', ctypes.c_uint32)
         ]
 
 
     class _DISPLAYCONFIG_PATH_TARGET_INFO(ctypes.Structure):
-        _fields_ = [
+        _fields_: ClassVar = [
             ('adapterId', _LUID),
             ('id', ctypes.c_uint32),
             ('dummyUnionName', _DUMMYUNIONNAME),
@@ -164,7 +164,7 @@ class _DISPLAYCONFIG_PATH_TARGET_INFO(ctypes.Structure):
 
 
     class _DISPLAYCONFIG_PATH_INFO(ctypes.Structure):
-        _fields_ = [
+        _fields_: ClassVar = [
             ('sourceInfo', _DISPLAYCONFIG_PATH_SOURCE_INFO),
             ('targetInfo', _DISPLAYCONFIG_PATH_TARGET_INFO),
             ('flags', ctypes.c_uint32)
@@ -174,14 +174,14 @@ class _DISPLAYCONFIG_PATH_INFO(ctypes.Structure):
     # ==================================== ModesInfo
 
     class _DISPLAYCONFIG_2DREGION(ctypes.Structure):
-        _fields_ = [
+        _fields_: ClassVar = [
             ('cx', ctypes.c_uint32),
             ('cy', ctypes.c_uint32)
         ]
 
 
     class _ADDITIONAL_SIGNAL_INFO(ctypes.Structure):
-        _fields_ = [
+        _fields_: ClassVar = [
             ('videoStandard', ctypes.c_uint32),
             ('vSyncFreqDivider', ctypes.c_uint32),
             ('reserved', ctypes.c_uint32)
@@ -189,14 +189,14 @@ class _ADDITIONAL_SIGNAL_INFO(ctypes.Structure):
 
 
     class _DUMMYUNIONNAME_MODE_SIGNAL(ctypes.Union):
-        _fields_ = [
+        _fields_: ClassVar = [
             ('additionalSignalInfo', _ADDITIONAL_SIGNAL_INFO),
             ('videoStandard', ctypes.c_uint32)
         ]
 
 
     class _DISPLAYCONFIG_VIDEO_SIGNAL_INFO(ctypes.Structure):
-        _fields_ = [
+        _fields_: ClassVar = [
             ('pixelRate', ctypes.c_uint64),
             ('hSyncFreq', _DISPLAYCONFIG_RATIONAL),
             ('vSyncFreq', _DISPLAYCONFIG_RATIONAL),
@@ -208,20 +208,20 @@ class _DISPLAYCONFIG_VIDEO_SIGNAL_INFO(ctypes.Structure):
 
 
     class _DISPLAYCONFIG_TARGET_MODE(ctypes.Structure):
-        _fields_ = [
+        _fields_: ClassVar = [
             ('targetVideoSignalInfo', _DISPLAYCONFIG_VIDEO_SIGNAL_INFO)
         ]
 
 
     class _POINTL(ctypes.Structure):
-        _fields_ = [
+        _fields_: ClassVar = [
             ('x', ctypes.wintypes.LONG),
             ('y', ctypes.wintypes.LONG)
         ]
 
 
     class _DISPLAYCONFIG_SOURCE_MODE(ctypes.Structure):
-        _fields_ = [
+        _fields_: ClassVar = [
             ('width', ctypes.c_uint32),
             ('height', ctypes.c_uint32),
             ('pixelFormat', ctypes.c_uint32),
@@ -230,7 +230,7 @@ class _DISPLAYCONFIG_SOURCE_MODE(ctypes.Structure):
 
 
     class _RECTL(ctypes.Structure):
-        _fields_ = [
+        _fields_: ClassVar = [
             ('left', ctypes.c_uint32),
             ('top', ctypes.c_uint32),
             ('right', ctypes.c_uint32),
@@ -239,7 +239,7 @@ class _RECTL(ctypes.Structure):
 
 
     class _DISPLAYCONFIG_DESKTOP_IMAGE_INFO(ctypes.Structure):
-        _fields_ = [
+        _fields_: ClassVar = [
             ('pathSourceSize', _POINTL),
             ('desktopImageRegion', _RECTL),
             ('desktopImageClip', _RECTL)
@@ -247,7 +247,7 @@ class _DISPLAYCONFIG_DESKTOP_IMAGE_INFO(ctypes.Structure):
 
 
     class _DUMMYUNIONNAME_MODE(ctypes.Union):
-        _fields_ = [
+        _fields_: ClassVar = [
             ('targetMode', _DISPLAYCONFIG_TARGET_MODE),
             ('sourceMode', _DISPLAYCONFIG_SOURCE_MODE),
             ('desktopImageInfo', _DISPLAYCONFIG_DESKTOP_IMAGE_INFO)
@@ -255,7 +255,7 @@ class _DUMMYUNIONNAME_MODE(ctypes.Union):
 
 
     class _DISPLAYCONFIG_MODE_INFO(ctypes.Structure):
-        _fields_ = [
+        _fields_: ClassVar = [
             ('infoType', ctypes.c_uint32),
             ('id', ctypes.c_uint32),
             ('adapterId', _LUID),
@@ -274,7 +274,7 @@ class _DISPLAYCONFIG_MODE_INFO(ctypes.Structure):
 
 
     class _DISPLAYCONFIG_DEVICE_INFO_HEADER(ctypes.Structure):
-        _fields_ = [
+        _fields_: ClassVar = [
             ('type', ctypes.c_uint32),
             ('size', ctypes.c_uint32),
             ('adapterId', _LUID),
@@ -286,7 +286,7 @@ class _DISPLAYCONFIG_DEVICE_INFO_HEADER(ctypes.Structure):
 
 
     class _DISPLAYCONFIG_SOURCE_DPI_SCALE_GET(ctypes.Structure):
-        _fields_ = [
+        _fields_: ClassVar = [
             ('header', _DISPLAYCONFIG_DEVICE_INFO_HEADER),
             ('minScaleRel', ctypes.c_uint32),
             ('curScaleRel', ctypes.c_uint32),
@@ -298,7 +298,7 @@ class _DISPLAYCONFIG_SOURCE_DPI_SCALE_GET(ctypes.Structure):
 
 
     class _DISPLAYCONFIG_SOURCE_DPI_SCALE_SET(ctypes.Structure):
-        _fields_ = [
+        _fields_: ClassVar = [
             ('header', _DISPLAYCONFIG_DEVICE_INFO_HEADER),
             ('scaleRel', ctypes.c_uint32)
         ]
@@ -308,7 +308,7 @@ class _DISPLAYCONFIG_SOURCE_DPI_SCALE_SET(ctypes.Structure):
 
 
     class _DISPLAY_CONFIG_TARGET_DEVICE_NAME(ctypes.Structure):
-        _fields_ = [
+        _fields_: ClassVar = [
             ('header', _DISPLAYCONFIG_DEVICE_INFO_HEADER),
             ('flags', ctypes.c_uint32),
             ('outputTechnology', ctypes.c_uint32),
@@ -324,7 +324,7 @@ class _DISPLAY_CONFIG_TARGET_DEVICE_NAME(ctypes.Structure):
 
 
     class _DISPLAYCONFIG_SOURCE_DEVICE_NAME(ctypes.Structure):
-        _fields_ = [
+        _fields_: ClassVar = [
             ('header', _DISPLAYCONFIG_DEVICE_INFO_HEADER),
             ('viewGdiDeviceName', ctypes.wintypes.WCHAR * 32)
         ]
diff --git a/typings/Quartz/__init__.pyi b/typings/Quartz/__init__.pyi
index 862d4c2..0473929 100644
--- a/typings/Quartz/__init__.pyi
+++ b/typings/Quartz/__init__.pyi
@@ -19,4 +19,4 @@ from Quartz.QuartzCore import *
 from Quartz.QuartzFilters import *
 from Quartz.QuickLookUI import *
 
-def __getattr__(__name: str) -> Any: ...
+def __getattr__(name: str, /) -> Any: ...