refactor: to timezone specific datetime helpers to avoid use deprecated functions

CHANGELOG.md

@@ -6,6 +6,10 @@
 
 1. [#92](https://github.com/InfluxCommunity/influxdb3-python/pull/92): Update `user-agent` header value to `influxdb3-python/{VERSION}` and add it to queries as well. 
 
+### Bug Fixes
+
+1. [#86](https://github.com/InfluxCommunity/influxdb3-python/pull/86): Refactor to `timezone` specific `datetime` helpers to avoid use deprecated functions
+
 ## 0.5.0 [2024-05-17]
 
 ### Features
@@ -24,7 +28,7 @@
 
     ```
 
-### Bugfix
+### Bug Fixes
 
 1. [#87](https://github.com/InfluxCommunity/influxdb3-python/pull/87): Fix examples to use `write_options` instead of the object name `WriteOptions`
 

influxdb_client_3/write_client/client/write/point.py

@@ -10,7 +10,7 @@
 from influxdb_client_3.write_client.client.util.date_utils import get_date_helper
 from influxdb_client_3.write_client.domain.write_precision import WritePrecision
 
-EPOCH = datetime.utcfromtimestamp(0).replace(tzinfo=timezone.utc)
+EPOCH = datetime.fromtimestamp(0, tz=timezone.utc)
 
 DEFAULT_WRITE_PRECISION = WritePrecision.NS
 

tests/test_point.py

@@ -0,0 +1,14 @@
+import datetime
+import unittest
+
+from influxdb_client_3.write_client.client.write.point import EPOCH, Point
+
+
+class TestPoint(unittest.TestCase):
+
+    def test_epoch(self):
+        self.assertEqual(EPOCH, datetime.datetime(1970, 1, 1, 0, 0, tzinfo=datetime.timezone.utc))
+
+    def test_point(self):
+        point = Point.measurement("h2o").tag("location", "europe").field("level", 2.2).time(1_000_000)
+        self.assertEqual('h2o,location=europe level=2.2 1000000', point.to_line_protocol())