Upgrade black, run lint under python 3.9 (#360)

Author: asherf

django_prometheus/db/common.py

@@ -65,16 +65,16 @@ class CursorWrapper(cursor_class):
 
         def execute(self, *args, **kwargs):
             execute_total.labels(alias, vendor).inc()
-            with query_duration_seconds.labels(**labels).time(), (
-                ExceptionCounterByType(errors_total, extra_labels=labels)
+            with query_duration_seconds.labels(**labels).time(), ExceptionCounterByType(
+                errors_total, extra_labels=labels
             ):
                 return super().execute(*args, **kwargs)
 
         def executemany(self, query, param_list, *args, **kwargs):
             execute_total.labels(alias, vendor).inc(len(param_list))
             execute_many_total.labels(alias, vendor).inc(len(param_list))
-            with query_duration_seconds.labels(**labels).time(), (
-                ExceptionCounterByType(errors_total, extra_labels=labels)
+            with query_duration_seconds.labels(**labels).time(), ExceptionCounterByType(
+                errors_total, extra_labels=labels
             ):
                 return super().executemany(query, param_list, *args, **kwargs)
 

django_prometheus/tests/end2end/testapp/test_caches.py

@@ -54,7 +54,6 @@ def testCounters(self):
             )
 
     def test_redis_cache_fail(self):
-
         # Note: test use fake service config (like if server was stopped)
         supported_cache = "redis"
 

pyproject.toml

@@ -15,13 +15,12 @@ include_trailing_comma = true
 [tool.tox]
 legacy_tox_ini = """
 [tox]
-envlist = {py37,py38,py39,py310}-django{320}-{end2end,unittests},{py38,py39,py310}-django{400,410}-{end2end,unittests},py38-lint
-
+envlist = {py37,py38,py39,py310}-django{320}-{end2end,unittests},{py38,py39,py310}-django{400,410}-{end2end,unittests},py39-lint
 [gh-actions]
 python =
     3.7: py37
-    3.8: py38, py38-lint
-    3.9: py39
+    3.8: py38
+    3.9: py39, py39-lint
     3.10: py310
 
 [testenv]
@@ -43,9 +42,9 @@ commands =
     unittests: coverage run --source=django_prometheus setup.py test
     unittests: python setup.py sdist bdist_wheel
 
-[testenv:py38-lint]
+[testenv:py39-lint]
 deps =
-    black==22.6.0
+    black==23.3.0
     flake8
     isort>=5.5.4,<6
     flake8-debugger