Clean up config and address warnings

jupyter_server/_tz.py

@@ -7,8 +7,7 @@
 # Distributed under the terms of the Modified BSD License.
 from __future__ import annotations
 
-from datetime import datetime, timedelta, tzinfo
-from typing import Callable
+from datetime import datetime, timedelta, timezone, tzinfo
 
 # constant for zero offset
 ZERO = timedelta(0)
@@ -26,21 +25,16 @@ def dst(self, d: datetime | None) -> timedelta:
         return ZERO
 
 
-UTC = tzUTC()  # type:ignore[abstract]
-
+def utcnow() -> datetime:
+    """Return timezone-aware UTC timestamp"""
+    return datetime.now(timezone.utc)
 
-def utc_aware(unaware: Callable[..., datetime]) -> Callable[..., datetime]:
-    """decorator for adding UTC tzinfo to datetime's utcfoo methods"""
 
-    def utc_method(*args, **kwargs):
-        dt = unaware(*args, **kwargs)
-        return dt.replace(tzinfo=UTC)
+def utcfromtimestamp(timestamp):
+    return datetime.fromtimestamp(timestamp, timezone.utc)
 
-    return utc_method
 
-
-utcfromtimestamp = utc_aware(datetime.utcfromtimestamp)
-utcnow = utc_aware(datetime.utcnow)
+UTC = tzUTC()  # type:ignore[abstract]
 
 
 def isoformat(dt: datetime) -> str:

pyproject.toml

@@ -20,10 +20,6 @@ classifiers = [
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",
     "Programming Language :: Python :: 3 :: Only",
-    "Programming Language :: Python :: 3.8",
-    "Programming Language :: Python :: 3.9",
-    "Programming Language :: Python :: 3.10",
-    "Programming Language :: Python :: 3.11",
 ]
 requires-python = ">=3.8"
 dependencies = [
@@ -249,7 +245,7 @@ minversion = "6.0"
 xfail_strict = true
 log_cli_level = "info"
 addopts = [
-  "-raXs", "--durations=10", "--color=yes", "--doctest-modules",
+  "-ra", "--durations=10", "--color=yes", "--doctest-modules",
    "--showlocals", "--strict-markers", "--strict-config"
 ]
 testpaths = [
@@ -265,14 +261,8 @@ filterwarnings = [
   "always:unclosed <socket.socket:ResourceWarning",
   "module:Jupyter is migrating its paths to use standard platformdirs:DeprecationWarning",
   "ignore:jupyter_server.base.zmqhandlers module is deprecated in Jupyter Server 2.0:DeprecationWarning",
-  "ignore:datetime.datetime.utcfromtimestamp:DeprecationWarning",
-  "ignore:datetime.datetime.utcnow:DeprecationWarning",
-  # from nbformat
-  "ignore:Importing ErrorTree directly from the jsonschema package:DeprecationWarning",
-  # From jupyter_events
-  "module:jsonschema.RefResolver is deprecated as of:DeprecationWarning",
-  # ignore pytest warnings.
-  "ignore:::_pytest",
+  "ignore:datetime.datetime.utc:DeprecationWarning:dateutil",
+  "ignore:datetime.datetime.utc:DeprecationWarning:tornado",
 ]
 
 [tool.coverage.report]
@@ -325,4 +315,4 @@ exclude = ["docs", "test"]
 ignore = ["W002"]
 
 [tool.repo-review]
-ignore = ["PY007", "PP308", "GH102", "MY101"]
+ignore = ["PY007", "GH102"]

tests/test_gateway.py

@@ -78,7 +78,7 @@ def generate_kernelspec(name):
 
 def generate_model(name):
     """Generate a mocked kernel model.  Caller is responsible for adding model to running_kernels dictionary."""
-    dt = datetime.utcnow().isoformat() + "Z"  # noqa
+    dt = datetime.now(timezone.utc).isoformat().replace("+00:00", "Z")
     kernel_id = str(uuid.uuid4())
     model = {
         "id": kernel_id,