add 3.13 support

Author: ahupp

setup.py

@@ -8,41 +8,43 @@
 
 def read(file_name):
     """Read a text file and return the content as a string."""
-    with io.open(os.path.join(os.path.dirname(__file__), file_name),
-                 encoding='utf-8') as f:
+    with io.open(
+        os.path.join(os.path.dirname(__file__), file_name), encoding="utf-8"
+    ) as f:
         return f.read()
 
+
 setuptools.setup(
-    name='python-magic',
-    description='File type identification using libmagic',
-    author='Adam Hupp',
-    author_email='[email protected]',
+    name="python-magic",
+    description="File type identification using libmagic",
+    author="Adam Hupp",
+    author_email="[email protected]",
     url="http://github.com/ahupp/python-magic",
-    version='0.4.28',
-    long_description=read('README.md'),
-    long_description_content_type='text/markdown',
-    packages=['magic'],
+    version="0.4.28",
+    long_description=read("README.md"),
+    long_description_content_type="text/markdown",
+    packages=["magic"],
     package_data={
-        'magic': ['py.typed', '*.pyi', '**/*.pyi'],
+        "magic": ["py.typed", "*.pyi", "**/*.pyi"],
     },
     keywords="mime magic file",
     license="MIT",
-    python_requires='>=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*',
+    python_requires=">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*",
     classifiers=[
-        'Intended Audience :: Developers',
-        'License :: OSI Approved :: MIT License',
-        'Programming Language :: Python',
-        'Programming Language :: Python :: 2.7',
-        'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.5',
-        'Programming Language :: Python :: 3.6',
-        'Programming Language :: Python :: 3.7',
-        'Programming Language :: Python :: 3.8',
-        'Programming Language :: Python :: 3.9',
-        'Programming Language :: Python :: 3.10',
-        'Programming Language :: Python :: 3.11',
-        'Programming Language :: Python :: 3.12',
-        'Programming Language :: Python :: Implementation :: CPython',
+        "Intended Audience :: Developers",
+        "License :: OSI Approved :: MIT License",
+        "Programming Language :: Python",
+        "Programming Language :: Python :: 2.7",
+        "Programming Language :: Python :: 3",
+        "Programming Language :: Python :: 3.5",
+        "Programming Language :: Python :: 3.6",
+        "Programming Language :: Python :: 3.7",
+        "Programming Language :: Python :: 3.8",
+        "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 :: Implementation :: CPython",
     ],
 )
-

tox.ini

@@ -9,6 +9,7 @@ envlist =
     py310,
     py311,
     py312,
+    py313,
     mypy
 
 [testenv]