Enable Ruff lint

Author: leplatrem

pyproject.toml

@@ -16,7 +16,7 @@ select = [
     # eradicate commented code
     "ERA",
     # ruff lint
-    # "RUF",
+    "RUF",
 ]
 ignore = [
     # `format` will wrap lines.

src/dockerflow/django/middleware.py

@@ -1,6 +1,7 @@
 import logging
 import re
 import time
+import typing
 import uuid
 
 from django.utils.deprecation import MiddlewareMixin
@@ -14,7 +15,7 @@ class DockerflowMiddleware(MiddlewareMixin):
     https://github.com/mozilla-services/Dockerflow/blob/main/docs/mozlog.md
     """
 
-    viewpatterns = [
+    viewpatterns: typing.ClassVar = [
         (re.compile(r"/__version__/?$"), views.version),
         (re.compile(r"/__heartbeat__/?$"), views.heartbeat),
         (re.compile(r"/__lbheartbeat__/?$"), views.lbheartbeat),

src/dockerflow/logging.py

@@ -8,6 +8,7 @@
 import socket
 import sys
 import traceback
+import typing
 
 
 class SafeJSONEncoder(json.JSONEncoder):
@@ -32,7 +33,7 @@ class JsonLogFormatter(logging.Formatter):
     LOGGING_FORMAT_VERSION = "2.0"
 
     # Map from Python logging to Syslog severity levels
-    SYSLOG_LEVEL_MAP = {
+    SYSLOG_LEVEL_MAP: typing.ClassVar = {
         50: 2,  # CRITICAL
         40: 3,  # ERROR
         30: 4,  # WARNING
@@ -43,7 +44,7 @@ class JsonLogFormatter(logging.Formatter):
     # Syslog level to use when/if python level isn't found in map
     DEFAULT_SYSLOG_LEVEL = 7
 
-    EXCLUDED_LOGRECORD_ATTRS = set(
+    EXCLUDED_LOGRECORD_ATTRS: typing.ClassVar = set(
         (
             "args",
             "asctime",

tests/flask/migrations/env.py

@@ -4,7 +4,7 @@
 from logging.config import fileConfig
 
 from alembic import context  # no:qa
-from flask import current_app  # noqa
+from flask import current_app
 from sqlalchemy import engine_from_config, pool
 
 # this is the Alembic Config object, which provides