chore: drop support for Python 3.9

Author: Rogdham

.github/workflows/build.yml

@@ -13,8 +13,8 @@ on:
 env:
   PYTHON_VER: "3.11" # Python to run test/cibuildwheel
   CIBW_BUILD: >
-    cp39-* cp310-* cp311-* cp312-* cp313-* cp314-*
-    pp39-* pp310-* pp311-*
+    cp310-* cp311-* cp312-* cp313-* cp314-*
+    pp310-* pp311-*
   CIBW_ENABLE: pypy pypy-eol
   CIBW_TEST_COMMAND: python -m unittest discover {project}/tests
 
@@ -91,7 +91,6 @@ jobs:
     strategy:
       matrix:
         py:
-          - "pypy-3.9"
           - "pypy-3.10"
           - "pypy-3.11"
 

CHANGELOG.md

@@ -2,6 +2,10 @@
 
 All notable changes to this project will be documented in this file.
 
+## Unreleased
+
+- Drop support for Python 3.9 and below
+
 ## 0.18.0 (October 5, 2025)
 
 - Support for Python 3.14

pyproject.toml

@@ -1,6 +1,5 @@
 [build-system]
 # setuptools 64+ support --build-option
-# setuptools 74+ drops distutils.msvc9compiler required for Python 3.9 under Windows
-requires = ["setuptools>=64,<74"]
+requires = ["setuptools>=64"]
 backend-path = ["build_script"]
 build-backend = "pyzstd_pep517"

setup.py

@@ -217,7 +217,7 @@ def do_setup():
         maintainer_email="[email protected]",
         url='https://github.com/Rogdham/pyzstd',
         license='BSD-3-Clause',
-        python_requires='>=3.5',
+        python_requires='>=3.10',
         install_requires=["typing-extensions>=4.13.2 ; python_version<'3.13'"],
 
         classifiers=[
@@ -227,7 +227,6 @@ def do_setup():
             "License :: OSI Approved :: BSD License",
             "Programming Language :: Python :: Implementation :: CPython",
             "Programming Language :: Python :: Implementation :: PyPy",
-            "Programming Language :: Python :: 3.9",
             "Programming Language :: Python :: 3.10",
             "Programming Language :: Python :: 3.11",
             "Programming Language :: Python :: 3.12",
@@ -245,12 +244,5 @@ def do_setup():
         test_suite='tests'
     )
 
-    if sys.version_info < (3, 9):
-        print()
-        print("WARNING")
-        print("    Python {} has reached end of life.".format(platform.python_version()))
-        print("    This version of Python will not be supported in future versions of pyzstd.")
-        print()
-
 if __name__ == '__main__':
     do_setup()