feat: convert timezone to UTC if tzinfo exists (#113)

CHANGELOG.md

@@ -1,5 +1,8 @@
 ## 1.9.0 [unreleased]
 
+### Features
+1. [#112](https://github.com/influxdata/influxdb-client-python/pull/113): Support timestamp with different timezone in _convert_timestamp
+
 ## 1.8.0 [2020-06-19]
 
 ### Features

influxdb_client/client/write/point.py

@@ -160,6 +160,8 @@ def _convert_timestamp(timestamp, precision=DEFAULT_WRITE_PRECISION):
         if isinstance(timestamp, datetime):
             if not timestamp.tzinfo:
                 timestamp = UTC.localize(timestamp)
+            else:
+                timestamp = timestamp.astimezone(UTC)
             ns = (timestamp - EPOCH).total_seconds() * 1e9
         else:
             ns = timestamp.total_seconds() * 1e9

tests/test_point.py

@@ -309,6 +309,14 @@ def test_from_dict_without_tags(self):
         point = Point.from_dict(json)
         self.assertEqual("my-org field1=1i,field2=2i", point.to_line_protocol())
 
+    def test_points_from_different_timezones(self):
+        time_in_utc = UTC.localize(datetime(2020, 7, 4, 0, 0, 0, 123456))
+        time_in_hk = timezone('Asia/Hong_Kong').localize(datetime(2020, 7, 4, 8, 0, 0, 123456))  # +08:00
+
+        point_utc = Point.measurement("h2o").field("val", 1).time(time_in_utc)
+        point_hk = Point.measurement("h2o").field("val", 1).time(time_in_hk)
+        self.assertEqual(point_utc.to_line_protocol(), point_hk.to_line_protocol())
+
 
 if __name__ == '__main__':
     unittest.main()