feat: use microseconds resolutions for data points

CHANGELOG.md

@@ -4,6 +4,7 @@
 1. [#112](https://github.com/influxdata/influxdb-client-python/pull/113): Support timestamp with different timezone in _convert_timestamp
 1. [#120](https://github.com/influxdata/influxdb-client-python/pull/120): ciso8601 is an optional dependency and has to be installed separably
 1. [#121](https://github.com/influxdata/influxdb-client-python/pull/121): Added query_data_frame_stream method
+1. [#132](https://github.com/influxdata/influxdb-client-python/pull/132): Use microseconds resolutions for data points
 
 ### Bug Fixes
 1. [#117](https://github.com/influxdata/influxdb-client-python/pull/117): Fixed appending default tags for single Point 

influxdb_client/client/write/point.py

@@ -152,6 +152,18 @@ def _escape_string(value):
     return str(value).translate(_ESCAPE_STRING)
 
 
+def _to_nanoseconds(delta):
+    """
+    Solution comes from v1 client. Thx.
+
+    https://github.com/influxdata/influxdb-python/pull/811
+    """
+    nanoseconds_in_days = delta.days * 86400 * 10 ** 9
+    nanoseconds_in_seconds = delta.seconds * 10 ** 9
+    nanoseconds_in_micros = delta.microseconds * 10 ** 3
+    return nanoseconds_in_days + nanoseconds_in_seconds + nanoseconds_in_micros
+
+
 def _convert_timestamp(timestamp, precision=DEFAULT_WRITE_PRECISION):
     if isinstance(timestamp, Integral):
         return timestamp  # assume precision is correct if timestamp is int
@@ -166,9 +178,9 @@ def _convert_timestamp(timestamp, precision=DEFAULT_WRITE_PRECISION):
                 timestamp = UTC.localize(timestamp)
             else:
                 timestamp = timestamp.astimezone(UTC)
-            ns = (timestamp - EPOCH).total_seconds() * 1e9
-        else:
-            ns = timestamp.total_seconds() * 1e9
+            timestamp = timestamp - EPOCH
+
+        ns = _to_nanoseconds(timestamp)
 
         if precision is None or precision == WritePrecision.NS:
             return ns
@@ -179,9 +191,4 @@ def _convert_timestamp(timestamp, precision=DEFAULT_WRITE_PRECISION):
         elif precision == WritePrecision.S:
             return ns / 1e9
 
-        # elif precision == 'm':
-        #     return ns / 1e9 / 60
-        # elif precision == 'h':
-        #     return ns / 1e9 / 3600
-
     raise ValueError(timestamp)

tests/test_point.py

@@ -7,10 +7,9 @@
 from pytz import UTC, timezone
 
 from influxdb_client import Point, WritePrecision
-from tests.base_test import BaseTest
 
 
-class PointTest(BaseTest):
+class PointTest(unittest.TestCase):
 
     def test_MeasurementEscape(self):
         point = Point.measurement("h2 o").tag("location", "europe").tag("", "warn").field("level", 2)
@@ -153,6 +152,20 @@ def test_TimeSpanFormatting(self):
 
         self.assertEqual("h2o,location=europe level=2i 123", point.to_line_protocol())
 
+        point = Point.measurement("h2o") \
+            .tag("location", "europe") \
+            .field("level", 2) \
+            .time(timedelta(microseconds=876), WritePrecision.NS)
+
+        self.assertEqual("h2o,location=europe level=2i 876000", point.to_line_protocol())
+
+        point = Point.measurement("h2o") \
+            .tag("location", "europe") \
+            .field("level", 2) \
+            .time(timedelta(milliseconds=954), WritePrecision.NS)
+
+        self.assertEqual("h2o,location=europe level=2i 954000000", point.to_line_protocol())
+
     def test_DateTimeFormatting(self):
         date_time = datetime(2015, 10, 15, 8, 20, 15)
 
@@ -172,6 +185,27 @@ def test_DateTimeFormatting(self):
 
         self.assertEqual("h2o,location=europe level=false 1444897215", point.to_line_protocol())
 
+        point = Point.measurement("h2o") \
+            .tag("location", "europe") \
+            .field("level", False) \
+            .time(date_time, WritePrecision.MS)
+
+        self.assertEqual("h2o,location=europe level=false 1444897215000", point.to_line_protocol())
+
+        point = Point.measurement("h2o") \
+            .tag("location", "europe") \
+            .field("level", False) \
+            .time(date_time, WritePrecision.US)
+
+        self.assertEqual("h2o,location=europe level=false 1444897215000750", point.to_line_protocol())
+
+        point = Point.measurement("h2o") \
+            .tag("location", "europe") \
+            .field("level", False) \
+            .time(date_time, WritePrecision.NS)
+
+        self.assertEqual("h2o,location=europe level=false 1444897215000750000", point.to_line_protocol())
+
         point = Point.measurement("h2o") \
             .tag("location", "europe") \
             .field("level", True) \