From b664c15977bfebac69bb2c43e9e5758bbc316356 Mon Sep 17 00:00:00 2001
From: Joakim Plate <elupus@ecce.se>
Date: Mon, 3 Jun 2024 19:57:17 +0000
Subject: [PATCH] Avoid loading timezone at runtime
Pytz will load timezone info from files in
a lazy fashion on first access. This triggers warnings in HA due to it blocking the event loop.
Pre-load the needed timezone info at module import instead, which will run in
executor in HA.
---
dsmr_parser/value_types.py | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/dsmr_parser/value_types.py b/dsmr_parser/value_types.py
index 487e98c..f915918 100644
--- a/dsmr_parser/value_types.py
+++ b/dsmr_parser/value_types.py
@@ -2,6 +2,9 @@ import datetime
import pytz
+# TODO : Use system timezone
+# Preload timezone to avoid loading in event loop later
+local_tz = pytz.timezone('Europe/Amsterdam')
def timestamp(value):
try:
@@ -20,8 +23,6 @@ def timestamp(value):
else:
is_dst = False
- # TODO : Use system timezone
- local_tz = pytz.timezone('Europe/Amsterdam')
localized_datetime = local_tz.localize(naive_datetime, is_dst=is_dst)
return localized_datetime.astimezone(pytz.utc)