Drop 3.9 support + add 3.14 CI (#524)

* Drop 3.9 support + add 3.14 CI

- Update pyproject.toml etc.
- Add to CI runs
- Drop 3.9 as flake8 itself did
- Remove expected error in b912_py314.py ...
  Can we double check that makes sense ...

Test:
- Run tox in 3.14
  - `python3 -m venv /tmp/tf --upgrade-deps`
  - `/tmp/tf/bin/pip install tox`
  - `/tmp/tf/bin/tox -e py314`
- Repeat in 3.13

* Fix missed version change in DEVELOPMENT.md

* Suppress SyntaxWarning for B012 in >= 3.14

* blacken the code

Author: cooperlees

.github/workflows/ci.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
 
         os: [ubuntu-latest]
 

.github/workflows/flake8_py_version_check.yml

@@ -9,10 +9,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v5
-    - name: Set up Python 3.12
+    - name: Set up Python3
       uses: actions/setup-python@v6
       with:
-        python-version: 3.12
         allow-prereleases: true
     - name: run script
       run: python scripts/flake8_py_version_check.py

DEVELOPMENT.md

@@ -80,7 +80,7 @@ You can also use [tox](https://tox.wiki/en/latest/index.html) to test with multi
 ```console
 /path/to/venv/bin/tox
 ```
-will by default run all tests on python versions 3.9 through 3.13. If you only want to test a specific version you can specify the environment with `-e`
+will by default run all tests on python versions 3.10 through 3.14. If you only want to test a specific version you can specify the environment with `-e`
 
 ```console
 /path/to/venv/bin/tox -e py313

pyproject.toml

@@ -26,16 +26,16 @@ classifiers = [
     "Operating System :: OS Independent",
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
+    "Programming Language :: Python :: 3.14",
     "Programming Language :: Python :: 3 :: Only",
     "Topic :: Software Development :: Libraries :: Python Modules",
     "Topic :: Software Development :: Quality Assurance",
 ]
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 dependencies = ["flake8>=7.2.0", "attrs>=22.2.0"]
 dynamic = ["version"]
 

tests/eval_files/b912_py314.py

@@ -1,6 +1,6 @@
 map(lambda x: x, "a", "b")  # B912: 0
 map(lambda x: x, "a", "b", *map("c"))  # B912: 0
-map(lambda x: x, "a", map(lambda x: x, "a"), strict=True)  # B912: 22
+map(lambda x: x, "a", map(lambda x: x, "a"), strict=True)
 
 map()
 map(lambda x: x, "a")

tests/test_bugbear.py

@@ -8,6 +8,7 @@
 import subprocess
 import sys
 import unittest
+import warnings
 from argparse import Namespace
 from pathlib import Path
 
@@ -54,7 +55,14 @@ def test_eval(
     ]
 
     bbc = BugBearChecker(filename=str(path), options=options)
-    errors = [e for e in bbc.run() if (test == "B950" or not e[2].startswith("B950"))]
+    # Suppress SyntaxWarnings for B012 tests which intentionally contain
+    # return/break/continue in finally blocks (SyntaxWarning in Python 3.14+)
+    with warnings.catch_warnings():
+        if test.startswith("B012"):
+            warnings.filterwarnings("ignore", category=SyntaxWarning)
+        errors = [
+            e for e in bbc.run() if (test == "B950" or not e[2].startswith("B950"))
+        ]
     errors.sort()
     assert errors == tuple_expected
 

tox.ini

@@ -5,13 +5,11 @@ envlist = py39, py310, py311, py312, py313, pep8_naming, mypy
 
 [gh-actions]
 python =
-    3.9: py39
     3.10: py310
     3.11: py311,pep8_naming
     3.12: py312
     3.13: py313,mypy
-    # blocked by https://github.com/ijl/orjson/issues/569
-    # 3.14: py314
+    3.14: py314
 
 [testenv]
 description = Run coverage
@@ -35,7 +33,7 @@ commands =
     coverage run -m pytest tests/test_bugbear.py -k b902 {posargs}
     coverage report -m
 
-[testenv:{py39-,py310-,py311-,py312-,py313-}mypy]
+[testenv:{py310-,py311-,py312-,py313-,py314-}mypy]
 deps =
     mypy
 commands =