Official support for python 3.12 and code clean-up after EOLed Python 3.6 and 3.7.

.github/workflows/testing.yml

@@ -10,42 +10,34 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v4
     - name: Set up Python 3.11
-      uses: actions/setup-python@v1
+      uses: actions/setup-python@v4
       with:
         python-version: 3.11
-    - name: Install flake8
+    - name: Install ruff
       shell: bash
       run: |
         python -V
-        python -m pip install "flake8<6.0.0"
-    # XXX: flake8 --diff is deprecated, broken and was removed
-    # in flake8 6.0.0: we should instead black-ify the full repo
-    # and run a full flake8 check at each PR.
-    - name: Run flake8 on diff with upstream/master
+        python -m pip install ruff
+    - name: Run ruff
       shell: bash
       run: |
-        bash ./.github/scripts/flake8_diff.sh
+        ruff .
 
   build:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
-        # TODO: add "3.12-dev" to the list
-        python_version: [3.7, 3.8, 3.9, "3.10", "3.11", "pypy-3.9"]
+        python_version: ["3.8", "3.9", "3.10", "3.11", "3.12", "pypy-3.9"]
         exclude:
           # Do not test all minor versions on all platforms, especially if they
           # are not the oldest/newest supported versions
-          - os: windows-latest
-            python_version: 3.7
           - os: windows-latest
             python_version: 3.8
             # as of  4/02/2020, psutil won't build under PyPy + Windows
           - os: windows-latest
             python_version: "pypy-3.9"
-          - os: macos-latest
-            python_version: 3.7
           - os: macos-latest
             python_version: 3.8
           - os: macos-latest
@@ -56,11 +48,12 @@ jobs:
     runs-on: ${{ matrix.os }}
 
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python_version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python_version }}
+        allow-prereleases: true
     - name: Install project and dependencies
       shell: bash
       run: |
@@ -72,11 +65,6 @@ jobs:
     - name: Display Python version
       shell: bash
       run: python -c "import sys; print(sys.version)"
-    - name: Look for syntax errors/undefined names
-      shell: bash
-      run: |
-        python -m flake8 . --count --verbose --select=E901,E999,F821,F822,F823 \
-          --show-source --statistics
     - name: Test with pytest
       shell: bash
       run: |
@@ -85,7 +73,7 @@ jobs:
         coverage combine --append
         coverage xml -i
     - name: Publish coverage results
-      uses: codecov/codecov-action@v1
+      uses: codecov/codecov-action@v3
       with:
         token: ${{ secrets.CODECOV_TOKEN }}
         file: ./coverage.xml
@@ -101,9 +89,9 @@ jobs:
       matrix:
         python_version: ["3.10"]
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v4
     - name: Set up Python
-      uses: actions/setup-python@v1
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python_version }}
     - name: Install project and dependencies
@@ -133,9 +121,9 @@ jobs:
       matrix:
         python_version: ["3.10"]
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v4
     - name: Set up Python
-      uses: actions/setup-python@v1
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python_version }}
     - name: Install project and dependencies
@@ -161,9 +149,9 @@ jobs:
       matrix:
         python_version: ["3.10"]
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v4
     - name: Set up Python
-      uses: actions/setup-python@v1
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python_version }}
     - name: Install downstream project and dependencies
@@ -186,9 +174,9 @@ jobs:
       matrix:
         python_version: ["3.10"]
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v4
     - name: Set up Python
-      uses: actions/setup-python@v1
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python_version }}
     - name: Install project and dependencies

CHANGES.md

@@ -1,6 +1,12 @@
-2.3.0 (development)
+3.0.0 (development)
 ===================
 
+- Officially support Python 3.12 and drop support for Python 3.6 and 3.7.
+  Dropping support for older Python versions made it possible to simplify the
+  code base signficantly, hopefully making it easier to contribute to and
+  maintain the project.
+  ([PR #515](https://github.com/cloudpipe/cloudpickle/pull/515))
+
 - Fix pickling of dataclasses and their instances.
   ([issue #386](https://github.com/cloudpipe/cloudpickle/issues/386),
    [PR #513](https://github.com/cloudpipe/cloudpickle/pull/513))

README.md

@@ -130,14 +130,14 @@ Running the tests
 
   or alternatively for a specific environment:
 
-      tox -e py37
+      tox -e py312
 
 
-- With `py.test` to only run the tests for your current version of
+- With `pytest` to only run the tests for your current version of
   Python:
 
       pip install -r dev-requirements.txt
-      PYTHONPATH='.:tests' py.test
+      PYTHONPATH='.:tests' pytest
 
 History
 -------

ci/install_coverage_subprocess_pth.py

@@ -5,7 +5,7 @@
 import os.path as op
 from sysconfig import get_path
 
-FILE_CONTENT = u"""\
+FILE_CONTENT = """\
 import coverage; coverage.process_startup()
 """
 

cloudpickle/__init__.py

@@ -1,8 +1,3 @@
 from cloudpickle.cloudpickle import *  # noqa
-from cloudpickle.cloudpickle_fast import CloudPickler, dumps, dump  # noqa
 
-# Conform to the convention used by python serialization libraries, which
-# expose their Pickler subclass at top-level under the  "Pickler" name.
-Pickler = CloudPickler
-
-__version__ = '2.3.0.dev0'
+__version__ = '3.0.0.dev0'