Eliminate even more implicit optional (#1845)

pymodbus/logging.py

@@ -2,10 +2,11 @@
 
 Released under the the BSD license
 """
+from __future__ import annotations
+
 import logging
 from binascii import b2a_hex
 from logging import NullHandler as __null
-from typing import Union
 
 from pymodbus.utilities import hexlify_packets
 
@@ -17,7 +18,7 @@
 
 
 def pymodbus_apply_logging_config(
-    level: Union[str, int] = logging.DEBUG, log_file_name: str = None
+    level: str | int = logging.DEBUG, log_file_name: str | None = None
 ):
     """Apply basic logging configuration used by default by Pymodbus maintainers.
 

pymodbus/repl/client/helper.py

@@ -1,10 +1,12 @@
 """Helper Module for REPL actions."""
+from __future__ import annotations
+
 import inspect
 
 # pylint: disable=missing-type-doc
 import json
 from collections import OrderedDict
-from typing import Any, Dict, List, Union
+from typing import Any
 
 import pygments
 from prompt_toolkit import print_formatted_text
@@ -59,7 +61,7 @@
     "set_timeout",
     "get_serial_settings",
 ]
-CLIENT_ATTRIBUTES: List[str] = []
+CLIENT_ATTRIBUTES: list[str] = []
 
 
 class Command:
@@ -229,8 +231,8 @@ def get_commands(client):
 class Result:
     """Represent result command."""
 
-    function_code: int = None
-    data: Union[Dict[int, Any], Any] = None
+    function_code: int | None = None
+    data: dict[int, Any] | Any = None
 
     def __init__(self, result):
         """Initialize.

pymodbus/server/reactive/main.py

@@ -95,10 +95,10 @@ class ReactiveModbusSlaveContext(ModbusSlaveContext):
 
     def __init__(
         self,
-        discrete_inputs: BaseModbusDataBlock = None,
-        coils: BaseModbusDataBlock = None,
-        input_registers: BaseModbusDataBlock = None,
-        holding_registers: BaseModbusDataBlock = None,
+        discrete_inputs: BaseModbusDataBlock,
+        coils: BaseModbusDataBlock,
+        input_registers: BaseModbusDataBlock,
+        holding_registers: BaseModbusDataBlock,
         zero_mode: bool = False,
         randomize: int = 0,
         change_rate: int = 0,