feat: support and validate CPython 3.14

.github/workflows/code-quality.yaml

@@ -8,18 +8,54 @@ on:
       - synchronize
 
 jobs:
+  legacy-python-3-6:
+    runs-on: ubuntu-24.04
+    container: ubuntu:20.04
+    steps:
+      - uses: actions/checkout@v7
+      - name: Set up Python 3.6
+        uses: actions/setup-python@v7
+        with:
+          python-version: "3.6"
+      - name: Display Python version
+        run: python -c "import sys; print(sys.version)"
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install flake8 pytest pytest-mock
+          python -m pip install -r requirements.txt
+          python -m pip install --no-deps .
+      - name: Lint with flake8
+        run: python -m flake8 .
+      - name: Test with pytest
+        run: python -m pytest
+
   build:
-    # compatible for py 3.6
-    runs-on: ubuntu-20.04
+    runs-on: ${{ matrix.runner }}
     strategy:
-      # You can use PyPy versions in python-version.
       matrix:
-        python-version: ["3.6", "3.7", "3.8", "3.9", "3.10", "3.11", "3.12"]
+        include:
+          - python-version: "3.7"
+            runner: ubuntu-22.04
+          - python-version: "3.8"
+            runner: ubuntu-24.04
+          - python-version: "3.9"
+            runner: ubuntu-24.04
+          - python-version: "3.10"
+            runner: ubuntu-24.04
+          - python-version: "3.11"
+            runner: ubuntu-24.04
+          - python-version: "3.12"
+            runner: ubuntu-24.04
+          - python-version: "3.13"
+            runner: ubuntu-24.04
+          - python-version: "3.14"
+            runner: ubuntu-24.04
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v7
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v7
         with:
           python-version: ${{ matrix.python-version }}
       # You can test your matrix by printing the current Python version
@@ -28,21 +64,56 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install flake8 pytest pytest-mock build
-          if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+          python -m pip install flake8 pytest pytest-mock build
+          if [ -f requirements.txt ]; then python -m pip install -r requirements.txt; fi
+          python -m pip install --no-deps .
       - name: Lint with flake8
         run: |
           # stop the build if there are Python syntax errors
-          flake8 .
+          python -m flake8 .
       - name: Test with pytest
         run: |
-          pytest
+          python -m pytest
       - name: Audit concurrency, memory, and thread cleanup
-        if: matrix.python-version == '3.12'
+        if: matrix.python-version == '3.12' || matrix.python-version == '3.14'
         run: python scripts/resource_audit.py --evaluations 20000 --workers 8
       - name: Build production distributions
-        if: matrix.python-version == '3.12'
+        if: matrix.python-version == '3.12' || matrix.python-version == '3.14'
         run: python -m build
       - name: Verify wheel contains production packages only
-        if: matrix.python-version == '3.12'
+        if: matrix.python-version == '3.12' || matrix.python-version == '3.14'
         run: python -c "import glob, zipfile; names = zipfile.ZipFile(glob.glob('dist/*.whl')[0]).namelist(); assert not any(name.startswith(('tests/', 'featbit_openfeature/')) for name in names)"
+      - name: Install and smoke-test the built wheel
+        if: matrix.python-version == '3.14'
+        run: |
+          python -m venv "$RUNNER_TEMP/featbit-wheel-test"
+          "$RUNNER_TEMP/featbit-wheel-test/bin/python" -m pip install --upgrade pip
+          "$RUNNER_TEMP/featbit-wheel-test/bin/python" -m pip install dist/*.whl
+          "$RUNNER_TEMP/featbit-wheel-test/bin/python" -m pip check
+          "$RUNNER_TEMP/featbit-wheel-test/bin/python" scripts/wheel_smoke.py \
+            --bootstrap tests/fbclient_test_data.json \
+            --expected-version-file release/package.json
+
+  minimum-dependencies:
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v7
+      - name: Set up Python 3.14
+        uses: actions/setup-python@v7
+        with:
+          python-version: "3.14"
+      - name: Install exact minimum dependencies
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install pytest pytest-mock
+          python -m pip install \
+            certifi==2018.4.16 \
+            urllib3==1.26.5 \
+            python-dateutil==2.8.2 \
+            websocket-client==1.0.0
+          python -m pip install --no-deps .
+          python -m pip check
+      - name: Test with pytest
+        run: python -m pytest
+      - name: Audit concurrency, memory, and thread cleanup
+        run: python scripts/resource_audit.py --evaluations 20000 --workers 8

.github/workflows/release.yaml

@@ -19,10 +19,10 @@ jobs:
   deploy:
     permissions:
       contents: write
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     environment: py-production
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
       - name: Read current version
         id: version
         run: |
@@ -31,26 +31,39 @@ jobs:
           with open("release/package.json") as file:
               print("value=%s" % json.load(file)["version"])
           PY
-      - name: Create GitHub Release
-        env:
-          GH_TOKEN: ${{ github.token }}
-        run: |
-          gh release create "v${{ steps.version.outputs.value }}" \
-            --title "v${{ steps.version.outputs.value }}" \
-            --notes-file release/description.md
       - name: Set up Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v7
         with:
-          python-version: '3.x'
+          python-version: '3.14'
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install build
+          python -m pip install build twine
       - name: Build package
         run: python -m build
+      - name: Check package metadata
+        run: python -m twine check dist/*
+      - name: Install and smoke-test the built wheel
+        env:
+          VERSION: ${{ steps.version.outputs.value }}
+        run: |
+          python -m venv "$RUNNER_TEMP/featbit-wheel-test"
+          "$RUNNER_TEMP/featbit-wheel-test/bin/python" -m pip install --upgrade pip
+          "$RUNNER_TEMP/featbit-wheel-test/bin/python" -m pip install dist/*.whl
+          "$RUNNER_TEMP/featbit-wheel-test/bin/python" -m pip check
+          "$RUNNER_TEMP/featbit-wheel-test/bin/python" scripts/wheel_smoke.py \
+            --bootstrap tests/fbclient_test_data.json \
+            --expected-version "$VERSION"
+      - name: Create GitHub Release
+        env:
+          GH_TOKEN: ${{ github.token }}
+          VERSION: ${{ steps.version.outputs.value }}
+        run: |
+          gh release create "v$VERSION" \
+            --title "v$VERSION" \
+            --notes-file release/description.md
       - name: Publish package distributions to PyPI
         uses: pypa/gh-action-pypi-publish@v1.12.4
         with:
           user: __token__
           password: ${{ secrets.PYPI_PASSWORD }}
-          verify-metadata: false

README.md

@@ -18,7 +18,10 @@ If you want to use your own data source, see [Offline Mode](#offline-mode).
 ## Get Started
 
 ### Installation
-Install the SDK using pip. This version is compatible with Python 3.6 through 3.12.
+Install the SDK using pip. This version is compatible with Python 3.6 through 3.14.
+CI is configured to test compatibility through Python 3.14, including the
+full unit suite and SDK resource-lifecycle audit.
+Free-threaded CPython 3.14 builds are not currently tested or supported.
 
 ```shell
 pip install fb-python-sdk

dev-requirements.txt

@@ -1,10 +1,10 @@
 certifi>=2018.4.16
-urllib3>=1.22.0
+urllib3>=1.26.5
 websocket-client>=1.0.0
 python-dateutil>=2.8.2
 flake8
 pytest
 pytest-mock
 autopep8
 build
-twine
+twine

release/description.md

@@ -1,5 +1,5 @@
 
-version: 1.1.8
+version: 1.1.9
 
 ## Break changes
 
@@ -16,6 +16,8 @@ version: 1.1.8
 
 ## Updates
 
+- support and test CPython versions 3.13 and 3.14
+- require urllib3 1.26.5 or newer for CPython 3.14 compatibility
 - handle Python versions 3.12.x
 - make client, WebSocket, event, and notice shutdown deterministic and idempotent
 - isolate runtime event and shutdown failures from application code

release/package.json

@@ -1,3 +1,3 @@
 {
-    "version":"1.1.8"
+    "version":"1.1.9"
 }

requirements.txt

@@ -1,4 +1,4 @@
 certifi>=2018.4.16
-urllib3>=1.22.0
+urllib3>=1.26.5
 python-dateutil>=2.8.2
-websocket-client>=1.0.0
+websocket-client>=1.0.0

scripts/wheel_smoke.py

@@ -0,0 +1,115 @@
+#!/usr/bin/env python3
+"""Exercise the installed wheel through the public offline client API."""
+
+import argparse
+import base64
+import json
+import site
+import threading
+from importlib import metadata
+from pathlib import Path
+
+import fbclient
+from fbclient.client import FBClient
+from fbclient.config import Config
+
+
+PACKAGE_NAME = "fb-python-sdk"
+FAKE_ENV_SECRET = base64.b64encode(b"fake_env_secret").decode()
+FAKE_URL = "http://fake"
+USER_ENABLED = {"key": "test-user-1", "name": "test-user-1", "country": "us"}
+USER_DISABLED = {
+    "key": "test-user-3",
+    "name": "test-user-3",
+    "country": "cn",
+    "major": "cs",
+}
+
+
+def parse_args():
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--bootstrap", type=Path, required=True)
+    parser.add_argument("--expected-version")
+    parser.add_argument("--expected-version-file", type=Path)
+    return parser.parse_args()
+
+
+def assert_installed_package():
+    package_path = Path(fbclient.__file__).resolve()
+    site_paths = [Path(path).resolve() for path in site.getsitepackages()]
+    assert any(package_path.is_relative_to(path) for path in site_paths), (
+        "fbclient was not imported from the wheel environment: %s" % package_path
+    )
+
+
+def assert_metadata(expected_version):
+    distribution = metadata.distribution(PACKAGE_NAME)
+    if expected_version:
+        assert distribution.version == expected_version
+
+    package_metadata = distribution.metadata
+    assert package_metadata["Requires-Python"] == ">=3.6, <3.15"
+    classifiers = package_metadata.get_all("Classifier") or []
+    assert "Programming Language :: Python :: 3.14" in classifiers
+    requirements = distribution.requires or []
+    assert any(requirement.startswith("urllib3>=1.26.5") for requirement in requirements)
+    return distribution.version
+
+
+def featbit_thread_ids():
+    return {
+        thread.ident
+        for thread in threading.enumerate()
+        if thread.ident is not None and thread.name.startswith("featbit-")
+    }
+
+
+def exercise_client(bootstrap_path):
+    baseline_threads = featbit_thread_ids()
+    states = []
+    config = Config(
+        FAKE_ENV_SECRET,
+        event_url=FAKE_URL,
+        streaming_url=FAKE_URL,
+        offline=True,
+    )
+    client = FBClient(config)
+
+    def on_status_change(state):
+        states.append(state.state_type.name)
+
+    client.update_status_provider.add_listener(on_status_change)
+    try:
+        assert client.initialize_from_external_json(bootstrap_path.read_text())
+        assert client.initialize
+        assert states == ["OK"]
+        assert client.variation("ff-test-bool", USER_ENABLED, False) is True
+        assert client.variation("ff-test-bool", USER_DISABLED, True) is False
+        assert client.variation("missing-flag", USER_ENABLED, False) is False
+        for _ in range(100):
+            assert client.variation("ff-test-bool", USER_ENABLED, False) is True
+    finally:
+        client.update_status_provider.remove_listener(on_status_change)
+        client.stop()
+        client.stop()
+
+    leaked_threads = featbit_thread_ids() - baseline_threads
+    assert not leaked_threads, "FeatBit worker threads leaked: %s" % leaked_threads
+    return states
+
+
+def main():
+    args = parse_args()
+    expected_version = args.expected_version
+    if args.expected_version_file:
+        expected_version = json.loads(
+            args.expected_version_file.read_text()
+        )["version"]
+    assert_installed_package()
+    version = assert_metadata(expected_version)
+    states = exercise_client(args.bootstrap)
+    print(json.dumps({"package": PACKAGE_NAME, "states": states, "version": version}))
+
+
+if __name__ == "__main__":
+    main()

setup.py

@@ -51,9 +51,11 @@ def parse_requirements(filename):
         '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',
     ],
     extras_require={
         "dev": dev_reqs
     },
-    python_requires='>=3.6, <3.13'
+    python_requires='>=3.6, <3.15'
 )