fix: resolve ruff lint errors (UP006, F401, I001, UP037)

Author: phoeluga

lcd_content_formatter/_driver.py

@@ -17,7 +17,6 @@
 from __future__ import annotations
 
 import time
-from typing import List
 
 try:
     from smbus2 import SMBus
@@ -94,7 +93,7 @@ def __init__(
             self._bus = SMBus(port)
         except OSError as exc:
             raise I2CError(f"Cannot open I2C bus {port}: {exc}") from exc
-        self._row_offsets: List[int] = [
+        self._row_offsets: list[int] = [
             0x00,
             0x40,
             cols,

lcd_content_formatter/display.py

@@ -5,10 +5,8 @@
 import copy
 import time
 from dataclasses import dataclass
-from typing import List
 
 from ._driver import PCF8574Driver
-from .exceptions import I2CError
 from .frame import Frame, FrameRow
 
 
@@ -74,7 +72,7 @@ def close(self) -> None:
         """Release the I2C bus. Call when finished with the display."""
         self._driver.close()
 
-    def __enter__(self) -> "HD44780":
+    def __enter__(self) -> HD44780:
         return self
 
     def __exit__(self, *_) -> None:
@@ -170,7 +168,7 @@ class _ScrollState:
         tmp_rows = tmp_frame.rows()
 
         # Pre-compute per-row padding (only relevant for scroll_in)
-        states: List[_ScrollState] = []
+        states: list[_ScrollState] = []
         for row in all_rows:
             if scroll_in and (
                 scroll_if_fit

lcd_content_formatter/frame.py

@@ -1,8 +1,8 @@
 from __future__ import annotations
 
 import uuid
-from dataclasses import dataclass, field
-from typing import Dict, Iterator, List, Optional
+from dataclasses import dataclass
+from typing import Iterator
 
 from .exceptions import DuplicateFrameRowError, FrameRowNotFoundError
 
@@ -38,7 +38,7 @@ class Frame:
     """
 
     def __init__(self) -> None:
-        self._rows: Dict[str, FrameRow] = {}
+        self._rows: dict[str, FrameRow] = {}
 
     def __len__(self) -> int:
         return len(self._rows)
@@ -142,7 +142,7 @@ def clear(self) -> None:
         """Remove all rows from this frame."""
         self._rows.clear()
 
-    def rows(self) -> List[FrameRow]:
+    def rows(self) -> list[FrameRow]:
         """Return all rows as an ordered list."""
         return list(self._rows.values())
 

tests/test_display.py

@@ -5,13 +5,12 @@
 """
 
 from dataclasses import dataclass
-from unittest.mock import MagicMock, call, patch
+from unittest.mock import MagicMock, patch
 
 import pytest
 
 from lcd_content_formatter.display import HD44780
-from lcd_content_formatter.frame import Frame, FrameRow
-
+from lcd_content_formatter.frame import Frame
 
 # ---------------------------------------------------------------------------
 # Helpers

tests/test_driver.py

@@ -4,18 +4,14 @@
 any platform without physical hardware.
 """
 
-from unittest.mock import MagicMock, call, patch
+from unittest.mock import MagicMock, patch
 
 import pytest
 
 from lcd_content_formatter._driver import (
-    PCF8574Driver,
     _BL,
-    _CMD_CLEAR,
-    _CMD_DDRAM,
-    _CMD_HOME,
-    _EN,
     _RS,
+    PCF8574Driver,
 )
 from lcd_content_formatter.exceptions import I2CError
 

tests/test_frame.py

@@ -5,7 +5,6 @@
 from lcd_content_formatter.exceptions import DuplicateFrameRowError, FrameRowNotFoundError
 from lcd_content_formatter.frame import Frame, FrameRow
 
-
 # ---------------------------------------------------------------------------
 # FrameRow
 # ---------------------------------------------------------------------------