diff --git a/doc/common/extensions/awaitable.py b/doc/common/extensions/awaitable.py
index d668242..0d2b4a8 100644
--- a/doc/common/extensions/awaitable.py
+++ b/doc/common/extensions/awaitable.py
@@ -26,7 +26,7 @@ def _is_async(self: _FunctionDefProperties) -> bool:
 
     try:
         return_type = self._obj.__annotations__["return"]
-    except Exception:
+    except (AttributeError, KeyError):
         return False
 
     return "MaybeAwaitable" in str(return_type)
diff --git a/doc/common/extensions/requirements.py b/doc/common/extensions/requirements.py
index f3691f6..21bbe63 100644
--- a/doc/common/extensions/requirements.py
+++ b/doc/common/extensions/requirements.py
@@ -22,6 +22,7 @@
 
 
 import os
+from typing import ClassVar
 
 from docutils import nodes
 from docutils.parsers.rst import Directive, directives
@@ -35,7 +36,7 @@ JS_FILE = "requirements.js"
 
 class PybricksRequirementsDirective(Directive):
     has_content = True
-    option_spec = {"header": directives.unchanged}
+    option_spec: ClassVar = {"header": directives.unchanged}
 
     required_arguments = 0
     optional_arguments = 10
diff --git a/doc/main/conf.py b/doc/main/conf.py
index 74abf9b..026312f 100644
--- a/doc/main/conf.py
+++ b/doc/main/conf.py
@@ -1,4 +1,3 @@
-#!/usr/bin/env python3
 #
 # Pybricks documentation build configuration file
 #
@@ -36,7 +35,9 @@ if tags.has("ide"):  # noqa F821
     html_css_files.append("css/ide.css")
     html_js_files = ["js/ide.js"]
 
-exec(open(os.path.abspath("../common/conf.py")).read())
+# Shared config must run in this namespace so it sees the globals above.
+with open(os.path.abspath("../common/conf.py")) as _f:
+    exec(_f.read())  # noqa: S102
 
 # Build hub specific example scripts.
 sys.path.append(os.path.abspath("../../examples/pup/hub_common"))
diff --git a/examples/ev3/bluetooth_pc/pcclient.py b/examples/ev3/bluetooth_pc/pcclient.py
index f101f6c..fd71f3e 100644
--- a/examples/ev3/bluetooth_pc/pcclient.py
+++ b/examples/ev3/bluetooth_pc/pcclient.py
@@ -1,4 +1,3 @@
-#!/usr/bin/env python3
 from pybricks.messaging import BluetoothMailboxClient, TextMailbox
 
 # This demo makes your PC talk to an EV3 over Bluetooth.
diff --git a/examples/ev3/bluetooth_pc/pcserver.py b/examples/ev3/bluetooth_pc/pcserver.py
index 9d76247..a018222 100644
--- a/examples/ev3/bluetooth_pc/pcserver.py
+++ b/examples/ev3/bluetooth_pc/pcserver.py
@@ -1,4 +1,3 @@
-#!/usr/bin/env python3
 from pybricks.messaging import BluetoothMailboxServer, TextMailbox
 
 # This demo makes your PC talk to an EV3 over Bluetooth.
diff --git a/examples/ev3/ps4/.gitignore b/examples/ev3/ps4/.gitignore
deleted file mode 100644
index 00f2d38..0000000
--- a/examples/ev3/ps4/.gitignore
+++ /dev/null
@@ -1,3 +0,0 @@
-__pycache__/
-*.pyc
-.venv/
diff --git a/examples/ev3/ps4/.vscode/extensions.json b/examples/ev3/ps4/.vscode/extensions.json
deleted file mode 100644
index f8f1a44..0000000
--- a/examples/ev3/ps4/.vscode/extensions.json
+++ /dev/null
@@ -1,13 +0,0 @@
-{
-	// See http://go.microsoft.com/fwlink/?LinkId=827846 to learn about workspace recommendations.
-	// Extension identifier format: ${publisher}.${name}. Example: vscode.csharp
-
-	// List of extensions which should be recommended for users of this workspace.
-	"recommendations": [
-		"lego-education.ev3-micropython"
-	],
-	// List of extensions recommended by VS Code that should not be recommended for users of this workspace.
-	"unwantedRecommendations": [
-		"ms-python.python"
-	]
-}
\ No newline at end of file
diff --git a/examples/ev3/ps4/.vscode/launch.json b/examples/ev3/ps4/.vscode/launch.json
deleted file mode 100644
index d933aeb..0000000
--- a/examples/ev3/ps4/.vscode/launch.json
+++ /dev/null
@@ -1,15 +0,0 @@
-{
-	// Use IntelliSense to learn about possible attributes.
-	// Hover to view descriptions of existing attributes.
-	// For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
-	"version": "0.2.0",
-	"configurations": [
-		{
-			"name": "Download and Run",
-			"type": "ev3devBrowser",
-			"request": "launch",
-			"program": "/home/robot/${workspaceRootFolderName}/main.py",
-			"interactiveTerminal": false
-		}
-	]
-}
diff --git a/examples/ev3/ps4/.vscode/settings.json b/examples/ev3/ps4/.vscode/settings.json
deleted file mode 100644
index b0968c1..0000000
--- a/examples/ev3/ps4/.vscode/settings.json
+++ /dev/null
@@ -1,7 +0,0 @@
-// Place your settings in this file to overwrite default and user settings.
-{
-	"files.eol": "\n",
-	"debug.openDebug": "neverOpen",
-	"python.linting.enabled": false,
-	"python.languageServer": "None"
-}
diff --git a/examples/ev3/ps4/main.py b/examples/ev3/ps4/main.py
deleted file mode 100644
index 08290fc..0000000
--- a/examples/ev3/ps4/main.py
+++ /dev/null
@@ -1,142 +0,0 @@
-import struct
-
-from pybricks.ev3devices import Motor
-from pybricks.parameters import Port
-
-# This program uses the two PS4 sticks to control two EV3 Large Servo Motors
-# using tank like controls. For a full map of all PS4 buttons, trackpad, and
-# motion checkout: https://github.com/codeadamca/python-connect-ps4
-
-# Initialize EV3 motors
-left_motor = Motor(Port.B)
-right_motor = Motor(Port.C)
-left_speed = 0
-right_speed = 0
-
-# Locate the event file you want to react to, on my setup the PS4 controller
-# button events are located in /dev/input/event4
-infile_path = "/dev/input/event4"
-in_file = open(infile_path, "rb")
-
-# Define the format the event data will be read.
-# https://docs.python.org/3/library/struct.html#format-characters
-FORMAT = "llHHi"
-EVENT_SIZE = struct.calcsize(FORMAT)
-event = in_file.read(EVENT_SIZE)
-
-
-# A helper function for converting stick values (0 to 255) to more usable
-# numbers (-100 to 100)
-def scale(val, src, dst):
-
-    result = float(val - src[0]) / (src[1] - src[0])
-    result = result * (dst[1] - dst[0]) + dst[0]
-    return result
-
-
-# Create a loop to react to events
-# This loop reacts to all main PS4 button and stick events. I have left out
-# buttons like share and options, but can easily be added in by referring
-# to the table at: https://github.com/codeadamca/python-connect-ps4
-
-
-while event:
-    # Place event data into variables
-    (tv_sec, tv_usec, ev_type, code, value) = struct.unpack(FORMAT, event)
-
-    # If a button was pressed or released
-    if ev_type == 1:
-        # React to the X button
-        if code == 304 and value == 0:
-            print("The X button was released")
-        elif code == 304 and value == 1:
-            print("The X button was pressed")
-
-        # React to the Circle button
-        elif code == 305 and value == 0:
-            print("The Circle button was released")
-        elif code == 305 and value == 1:
-            print("The Circle button was pressed")
-
-        # React to the Triangle button
-        elif code == 307 and value == 0:
-            print("The Triangle button was released")
-        elif code == 307 and value == 1:
-            print("The Triangle button was pressed")
-
-        # React to the Square button
-        elif code == 308 and value == 0:
-            print("The Square button was released")
-        elif code == 308 and value == 1:
-            print("The Square button was pressed")
-
-        # React to the L1 button
-        elif code == 310 and value == 0:
-            print("The L1 button was released")
-        elif code == 310 and value == 1:
-            print("The L1 button was pressed")
-
-        # React to the R1 button
-        elif code == 311 and value == 0:
-            print("The R1 button was released")
-        elif code == 311 and value == 1:
-            print("The R1 button was pressed")
-
-        # React to the L2 button
-        elif code == 312 and value == 0:
-            print("The L2 button was released")
-        elif code == 312 and value == 1:
-            print("The L2 button was pressed")
-
-        # React to the R2 button
-        elif code == 313 and value == 0:
-            print("The R2 button was released")
-        elif code == 313 and value == 1:
-            print("The R2 button was pressed")
-
-    elif ev_type == 3:
-        # The sticks often trigger non-stop events, comment this out if you are
-        # not using the sticks as part of your project, or it becomes hard to
-        # read other data
-
-        # React to the left stick vertical
-        if code == 1:
-            print("The left stick vertical is at ", value)
-            left_speed = scale(value, (0, 255), (100, -100))
-
-        # React to the left stick horizontal
-        elif code == 0:
-            print("The left stick horizontal is at ", value)
-
-        # React to the right stick vertical
-        elif code == 4:
-            print("The right stick vertical is at ", value)
-            right_speed = scale(value, (0, 255), (100, -100))
-
-        # React to the right stick horizontal
-        elif code == 3:
-            print("The right stick horizontal is at ", value)
-
-        # React to the Directional pad
-        if code == 16 and value == -1:
-            print("The horizontal directional pad is left")
-        elif code == 16 and value == 1:
-            print("The horizontal directional pad is right")
-        elif code == 16 and value == 0:
-            print("The horizontal directional pad is released")
-
-        elif code == 17 and value == -1:
-            print("The vertical directional pad is up")
-        elif code == 17 and value == 1:
-            print("The horizontal directional pad is down")
-        elif code == 17 and value == 0:
-            print("The horizontal directional pad is released")
-
-    # Set motor speed
-    left_motor.dc(left_speed)
-    right_motor.dc(right_speed)
-
-    # Read the next event
-    event = in_file.read(EVENT_SIZE)
-
-in_file.close()
diff --git a/src/ubuiltins/__init__.py b/src/ubuiltins/__init__.py
index fcabd7f..1ee7f70 100644
--- a/src/ubuiltins/__init__.py
+++ b/src/ubuiltins/__init__.py
@@ -23,14 +23,10 @@ import builtins
 from collections.abc import Callable, Hashable, Iterable, Iterator, Mapping, Sequence
 from typing import (
     Any,
-    Dict,
-    List,
     Literal,
     SupportsComplex,
     SupportsFloat,
     SupportsInt,
-    TypeVar,
-    Union,
     overload,
 )
 
@@ -50,7 +46,9 @@ _complex = complex
 _dict = dict
 _float = float
 _int = int
+_list = list
 _str = str
+_tuple = tuple
 _type = type
 
 
@@ -171,8 +169,8 @@ class bytes:
     def __init__(self, source: _str, encoding: _str) -> None: ...
 
     def __init__(self, *args):
-        r"""
-        bytes(​)
+        """
+        bytes(\u200b)
         bytes(integer)
         bytes(iterable)
         bytes(string, encoding)
@@ -207,8 +205,8 @@ class bytearray:
     def __init__(self, source: _bytes | _bytearray | _str | Iterable[_int]) -> None: ...
 
     def __init__(self, *args):
-        r"""
-        bytearray(​)
+        """
+        bytearray(\u200b)
         bytearray(integer)
         bytearray(iterable)
         bytearray(string)
@@ -328,17 +326,17 @@ class dict:
 
 
 @overload
-def dir() -> list[_str]: ...
+def dir() -> _list[_str]: ...
 
 
 @overload
-def dir(object: Any) -> list[_str]: ...
+def dir(object: Any) -> _list[_str]: ...
 
 
-def dir(*args) -> list[_str]:
+def dir(*args) -> _list[_str]:
     """
-    dir() -> List[str]
-    dir(object) -> List[str]
+    dir() -> list[str]
+    dir(object) -> list[str]
 
     Gets a list of attributes of an object.
 
@@ -354,11 +352,11 @@ def dir(*args) -> list[_str]:
 
 
 @overload
-def divmod(a: _int, b: _int) -> tuple[_int, _int]: ...
+def divmod(a: _int, b: _int) -> _tuple[_int, _int]: ...
 
 
 @overload
-def divmod(a: _float, b: _float) -> tuple[_float, _float]: ...
+def divmod(a: _float, b: _float) -> _tuple[_float, _float]: ...
 
 
 def divmod(a, b):
@@ -689,7 +687,7 @@ class int:
         """
 
 
-def isinstance(object: Any, classinfo: _type | tuple[_type]) -> _bool:
+def isinstance(object: Any, classinfo: _type | _tuple[_type]) -> _bool:
     """
     isinstance(object, classinfo) -> bool
 
@@ -705,7 +703,7 @@ def isinstance(object: Any, classinfo: _type | tuple[_type]) -> _bool:
     """
 
 
-def issubclass(cls: _type, classinfo: _type | tuple[_type]) -> _bool:
+def issubclass(cls: _type, classinfo: _type | _tuple[_type]) -> _bool:
     """
     issubclass(cls, classinfo) -> bool
 
diff --git a/src/uerrno/__init__.py b/src/uerrno/__init__.py
index e9d7172..b5defd7 100644
--- a/src/uerrno/__init__.py
+++ b/src/uerrno/__init__.py
@@ -9,8 +9,6 @@
 This module provides access to symbolic error codes for `OSError` exception.
 """
 
-from typing import Dict
-
 EAGAIN: int
 """
 The operation is not complete and should be tried again soon.
diff --git a/src/uio/__init__.py b/src/uio/__init__.py
index 0460299..18f6d0c 100644
--- a/src/uio/__init__.py
+++ b/src/uio/__init__.py
@@ -11,7 +11,7 @@ This module contains ``stream`` objects that behave like files.
 
 # TODO: open() is not implemented on Powered Up hubs
 
-from typing import Union, overload
+from typing import overload
 
 # TODO: MicroPython streams implement '__enter__', '__exit__', 'close', 'read',
 # 'readinto', 'readline', 'write', 'flush', 'seek', 'tell'