Remove dependency on pytz

pyproject.toml

@@ -68,7 +68,6 @@ backoff = ">=1.11.1"
 beautifulsoup4 = ">=4.11.1"
 certifi = ">=2023.07.22"
 python = "^3.9.0"
-pytz = ">=2019.3"
 voluptuous = ">=0.11.7"
 websockets = ">=8.1"
 
@@ -96,7 +95,6 @@ requests = ">=2.31.0"
 ruff = ">=0.0.261,<0.0.291"
 safety = "^2.3.1"
 sphinx-rtd-theme = "^1.0.0"
-types-pytz = ">=2022.1,<2024.0"
 vulture = "^2.6"
 yamllint = "^1.28.0"
 

simplipy/util/dt.py

@@ -1,9 +1,5 @@
 """Define datetime utilities."""
-from datetime import datetime
-
-import pytz
-
-UTC = pytz.utc
+from datetime import datetime, timezone
 
 
 def utc_from_timestamp(timestamp: float) -> datetime:
@@ -15,4 +11,4 @@ def utc_from_timestamp(timestamp: float) -> datetime:
     Returns:
         A parsed ``datetime.datetime`` object.
     """
-    return UTC.localize(datetime.utcfromtimestamp(timestamp))
+    return datetime.fromtimestamp(timestamp, tz=timezone.utc)

tests/system/test_v3.py

@@ -1,13 +1,12 @@
 """Define tests for v3 System objects."""
 # pylint: disable=too-many-lines
 import logging
-from datetime import datetime, timedelta
+from datetime import datetime, timedelta, timezone
 from typing import Any, cast
 from unittest.mock import Mock
 
 import aiohttp
 import pytest
-import pytz
 from aresponses import ResponsesMockServer
 
 from simplipy import API
@@ -54,7 +53,9 @@ async def test_as_dict(
                     "category": "error",
                     "code": "2000",
                     "timestamp": 1581823228,
-                    "received_dt": datetime(2020, 2, 16, 3, 20, 28, tzinfo=pytz.UTC),
+                    "received_dt": datetime(
+                        2020, 2, 16, 3, 20, 28, tzinfo=timezone.utc
+                    ),
                     "link": "http://link.to.info",
                     "link_label": "More Info",
                 }
@@ -1680,7 +1681,7 @@ async def test_system_notifications(
         assert notification1.category == "error"
         assert notification1.code == "2000"
         assert notification1.received_dt == datetime(
-            2020, 2, 16, 3, 20, 28, tzinfo=pytz.UTC
+            2020, 2, 16, 3, 20, 28, tzinfo=timezone.utc
         )
         assert notification1.link == "http://link.to.info"
         assert notification1.link_label == "More Info"

tests/test_websocket.py

@@ -4,13 +4,12 @@
 import asyncio
 import logging
 from collections import deque
-from datetime import datetime, timedelta
+from datetime import datetime, timedelta, timezone
 from time import time
 from typing import Any
 from unittest.mock import AsyncMock, Mock
 
 import pytest
-import pytz
 from aiohttp.client_exceptions import (
     ClientError,
     ServerDisconnectedError,
@@ -142,7 +141,7 @@ def test_create_event(ws_message_event: dict[str, Any]) -> None:
     assert event.event_type == EVENT_DISARMED_BY_MASTER_PIN
     assert event.info == "System Disarmed by Master PIN"
     assert event.system_id == 12345
-    assert event.timestamp == datetime(2021, 9, 29, 23, 14, 46, tzinfo=pytz.UTC)
+    assert event.timestamp == datetime(2021, 9, 29, 23, 14, 46, tzinfo=timezone.utc)
     assert event.changed_by == "Master PIN"
     assert event.sensor_name == ""
     assert event.sensor_serial == "abcdef12"