From 32cb9db8835a0580ab1d8875a2beed68b15d37d2 Mon Sep 17 00:00:00 2001
From: anders-albert <anders0albert@gmail.com>
Date: Wed, 4 Sep 2024 08:43:15 +0200
Subject: [PATCH] =?UTF-8?q?=C3=83refactor:=20update?=
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---
 .../data_modeling/typed_instances.py          |  5 ++---
 cognite/client/utils/_time.py                 | 17 --------------
 tests/tests_unit/test_utils/test_time.py      | 22 -------------------
 3 files changed, 2 insertions(+), 42 deletions(-)

diff --git a/cognite/client/data_classes/data_modeling/typed_instances.py b/cognite/client/data_classes/data_modeling/typed_instances.py
index dbf7e973b7..8faa59e724 100644
--- a/cognite/client/data_classes/data_modeling/typed_instances.py
+++ b/cognite/client/data_classes/data_modeling/typed_instances.py
@@ -3,7 +3,7 @@
 import inspect
 from abc import ABC
 from collections.abc import Iterable
-from datetime import date
+from datetime import date, datetime
 from typing import TYPE_CHECKING, Any, cast
 
 from typing_extensions import Self
@@ -20,7 +20,6 @@
     _serialize_property_value,
 )
 from cognite.client.utils._text import to_camel_case
-from cognite.client.utils._time import timestamp_str_to_datetime
 
 if TYPE_CHECKING:
     from cognite.client import CogniteClient
@@ -305,7 +304,7 @@ def _deserialize_value(value: Any, parameter: inspect.Parameter) -> Any:
         return value
     annotation = str(parameter.annotation)
     if "datetime" in annotation and isinstance(value, str):
-        return timestamp_str_to_datetime(value)
+        return datetime.strptime(value, "%Y-%m-%dT%H:%M:%S.%f%z")
     elif "date" in annotation and isinstance(value, str):
         return date.fromisoformat(value)
     elif DirectRelationReference.__name__ in annotation and isinstance(value, dict):
diff --git a/cognite/client/utils/_time.py b/cognite/client/utils/_time.py
index 370ba68996..7c46ea778c 100644
--- a/cognite/client/utils/_time.py
+++ b/cognite/client/utils/_time.py
@@ -178,23 +178,6 @@ def datetime_to_ms_iso_timestamp(dt: datetime) -> str:
     raise TypeError(f"Expected datetime object, got {type(dt)}")
 
 
-def timestamp_str_to_datetime(timestamp: str) -> datetime:
-    """Converts a timestamp string in ISO 8601 format to a datetime object.
-
-    Args:
-        timestamp (str): Timestamp string in ISO 8601 format
-
-    Returns:
-        datetime: Datetime object
-    """
-    try:
-        return datetime.fromisoformat(timestamp)
-    except ValueError:
-        # Typically hits if the timestamp is missing milliseconds
-        # For example, "2021-01-01T00:00:00.17+00:00", i.e. missing the last digit
-        return datetime.strptime(timestamp, "%Y-%m-%dT%H:%M:%S.%f%z")
-
-
 def split_granularity_into_quantity_and_normalized_unit(granularity: str) -> tuple[int, str]:
     """A normalized unit is any unit accepted by the API"""
     if match := re.match(r"(\d+)(.*)", granularity):
diff --git a/tests/tests_unit/test_utils/test_time.py b/tests/tests_unit/test_utils/test_time.py
index 1204448ed3..b55250d308 100644
--- a/tests/tests_unit/test_utils/test_time.py
+++ b/tests/tests_unit/test_utils/test_time.py
@@ -27,7 +27,6 @@
     parse_str_timezone,
     parse_str_timezone_offset,
     split_time_range,
-    timestamp_str_to_datetime,
     timestamp_to_ms,
     to_fixed_utc_intervals,
     to_pandas_freq,
@@ -231,27 +230,6 @@ def test_negative(self, t):
             timestamp_to_ms(t)
 
 
-class TestTimestampStrToDatetime:
-    @pytest.mark.parametrize(
-        "timestamp_str, expected",
-        [
-            ("2021-01-01T00:00:00.000+00:00", datetime(2021, 1, 1, 0, 0, 0, 0, tzinfo=timezone.utc)),
-            ("2021-01-01T00:00:00.000+01:00", datetime(2021, 1, 1, 0, 0, 0, 0, tzinfo=timezone(timedelta(hours=1)))),
-            (
-                "2021-01-01T00:00:00.000+01:15",
-                datetime(2021, 1, 1, 0, 0, 0, 0, tzinfo=timezone(timedelta(hours=1, minutes=15))),
-            ),
-            (
-                "2021-01-01T00:00:00.000-01:15",
-                datetime(2021, 1, 1, 0, 0, 0, 0, tzinfo=timezone(timedelta(hours=-1, minutes=-15))),
-            ),
-            ("2024-09-03T09:36:01.17+00:00", datetime(2024, 9, 3, 9, 36, 1, 170000, tzinfo=timezone.utc)),
-        ],
-    )
-    def test_valid_timestamp_str(self, timestamp_str: str, expected: datetime) -> None:
-        assert expected == timestamp_str_to_datetime(timestamp_str)
-
-
 class TestGranularityToMs:
     @pytest.mark.parametrize(
         "granularity, expected_ms",