Drop support for Python 3.9

Author: jacobtylerwalls

.github/workflows/primer-test.yaml

@@ -30,7 +30,7 @@ jobs:
     timeout-minutes: 5
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.10", "3.11", "3.12", "3.13"]
     outputs:
       python-key: ${{ steps.generate-python-key.outputs.key }}
     steps:
@@ -72,7 +72,7 @@ jobs:
     needs: prepare-tests-linux
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.10", "3.11", "3.12", "3.13"]
     steps:
       - name: Check out code from GitHub
         uses: actions/[email protected]

.github/workflows/primer_run_main.yaml

@@ -29,7 +29,7 @@ jobs:
     timeout-minutes: 45
     strategy:
       matrix:
-        python-version: ["3.9", "3.13"]
+        python-version: ["3.10", "3.13"]
         batches: [4]
         batchIdx: [0, 1, 2, 3]
     steps:

.github/workflows/primer_run_pr.yaml

@@ -38,7 +38,7 @@ jobs:
     timeout-minutes: 45
     strategy:
       matrix:
-        python-version: ["3.9", "3.13"]
+        python-version: ["3.10", "3.13"]
         batches: [4]
         batchIdx: [0, 1, 2, 3]
     steps:
@@ -217,7 +217,8 @@ jobs:
           echo ${{ github.event.pull_request.number }} | tee pr_number.txt
       - name: Upload PR number
         if:
-          startsWith(steps.python.outputs.python-version, '3.9') && matrix.batchIdx == 0
+          startsWith(steps.python.outputs.python-version, '3.10') && matrix.batchIdx ==
+          0
         uses: actions/[email protected]
         with:
           name: pr_number

.github/workflows/tests.yaml

@@ -31,12 +31,10 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.10", "3.11", "3.12", "3.13"]
         include:
           - os: macos-latest
-            python-version: "3.9"
-          - os: ubuntu-latest
-            python-version: "pypy-3.9"
+            python-version: "3.10"
           - os: ubuntu-latest
             python-version: "pypy-3.10"
           - os: ubuntu-latest
@@ -190,7 +188,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.10", "3.11", "3.12", "3.13"]
     steps:
       - name: Set temp directory
         run: echo "TEMP=$env:USERPROFILE\AppData\Local\Temp" >> $env:GITHUB_ENV

README.rst

@@ -45,7 +45,7 @@ What is Pylint?
 ---------------
 
 Pylint is a `static code analyser`_ for Python 2 or 3. The latest version supports Python
-3.9.0 and above.
+3.10.0 and above.
 
 .. _`static code analyser`: https://en.wikipedia.org/wiki/Static_code_analysis
 

doc/whatsnew/fragments/10405.other

@@ -0,0 +1,4 @@
+Remove support for launching pylint with Python 3.9.
+Code that supports Python 3.9 can still be linted with the ``--py-version=3.9`` setting.
+
+Refs #10405

pylintrc

@@ -50,7 +50,7 @@ unsafe-load-any-extension=no
 extension-pkg-allow-list=
 
 # Minimum supported python version
-py-version = 3.9.0
+py-version = 3.10.0
 
 # Control the amount of potential inferred values when inferring a single
 # object. This can help the performance when dealing with large functions or

pyproject.toml

@@ -13,15 +13,14 @@ license-files = [ "LICENSE", "CONTRIBUTORS.txt" ]
 authors = [
   { name = "Python Code Quality Authority", email = "[email protected]" },
 ]
-requires-python = ">=3.9.0"
+requires-python = ">=3.10.0"
 classifiers = [
   "Development Status :: 6 - Mature",
   "Environment :: Console",
   "Intended Audience :: Developers",
   "Operating System :: OS Independent",
   "Programming Language :: Python",
   "Programming Language :: Python :: 3 :: Only",
-  "Programming Language :: Python :: 3.9",
   "Programming Language :: Python :: 3.10",
   "Programming Language :: Python :: 3.11",
   "Programming Language :: Python :: 3.12",

tests/primer/packages_to_prime.json

@@ -29,7 +29,6 @@
     "branch": "master",
     "directories": ["music21"],
     "pylintrc_relpath": ".pylintrc",
-    "minimum_python": "3.10",
     "url": "https://github.com/cuthbertLab/music21"
   },
   "pandas": {

tox.ini

@@ -1,6 +1,6 @@
 [tox]
 minversion = 3.0
-envlist = formatting, py39, py310, py311, py312, py313, pypy, benchmark
+envlist = formatting, py310, py311, py312, py313, pypy, benchmark
 skip_missing_interpreters = true
 requires = pip >=21.3.1
 isolated_build = true