Fully support Python 3.13, including CI testing and wheel building

.github/workflows/fuzz.yml

@@ -22,7 +22,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
 
     steps:
       - uses: actions/checkout@v4
@@ -31,6 +31,7 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
+          allow-prereleases: true
 
       - name: Install dependencies
         run: |

.github/workflows/pypi_upload.yml

@@ -48,7 +48,7 @@ jobs:
       - uses: actions/checkout@v4
       - name: Install cibuildwheel and pypyp
         run: |
-          pipx install cibuildwheel==2.19.2
+          pipx install cibuildwheel==2.20.0
           pipx install pypyp==1
       - name: generate matrix
         if: github.event_name != 'pull_request'
@@ -89,7 +89,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
-      - uses: pypa/cibuildwheel@v2.19.2
+      - uses: pypa/cibuildwheel@v2.20.0
         with:
           only: ${{ matrix.only }}
 

.github/workflows/release_tests.yml

@@ -25,7 +25,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        python-version: ["3.12"]
+        python-version: ["3.13"]
         os: [macOS-latest, ubuntu-latest, windows-latest]
 
     steps:

.github/workflows/test.yml

@@ -31,7 +31,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "pypy-3.9"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13", "pypy-3.9"]
         os: [ubuntu-latest, macOS-latest, windows-latest]
 
     steps:
@@ -41,6 +41,7 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
+          allow-prereleases: true
 
       - name: Install tox
         run: |

CHANGES.md

@@ -6,6 +6,8 @@
 
 <!-- Include any especially major or disruptive changes here -->
 
+- Black now officially supports Python 3.13 (#4436)
+
 ### Stable style
 
 <!-- Changes that affect Black's stable style -->

pyproject.toml

@@ -60,6 +60,7 @@ classifiers = [
   "Programming Language :: Python :: 3.10",
   "Programming Language :: Python :: 3.11",
   "Programming Language :: Python :: 3.12",
+  "Programming Language :: Python :: 3.13",
   "Topic :: Software Development :: Libraries :: Python Modules",
   "Topic :: Software Development :: Quality Assurance",
 ]