From 357312371fd54acf5b8707e74680df0bcd50bf12 Mon Sep 17 00:00:00 2001
From: James Butler <james.butler@revvity.com>
Date: Wed, 12 Nov 2025 22:33:15 -0500
Subject: [PATCH] ENH: Drop support for Python 3.9

Python 3.9 is now end-of-life as of 2025-10-31 (see https://endoflife.date/python).
---
 .github/workflows/run_unit_tests.yml | 5 ++---
 pyproject.toml                       | 3 +--
 2 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/.github/workflows/run_unit_tests.yml b/.github/workflows/run_unit_tests.yml
index 03283c1..5b6258a 100644
--- a/.github/workflows/run_unit_tests.yml
+++ b/.github/workflows/run_unit_tests.yml
@@ -16,7 +16,6 @@ jobs:
     strategy:
       matrix:
         python-version: [
-          "3.9",
           "3.10",
           "3.11",
           "3.12",
@@ -28,7 +27,7 @@ jobs:
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@0b93645e9fea7318ecaed2b359559ac225c90a2b  # v5.3.0
       with:
-        python-version: ${{ matrix.python-version }} 
+        python-version: ${{ matrix.python-version }}
     - name: Install uv
       uses: astral-sh/setup-uv@d0cc045d04ccac9d8b7881df0226f9e82c39688e  # v6.8.0
       with:
@@ -36,7 +35,7 @@ jobs:
     - name: Install dependencies
       run: uv sync
     - name: Lint with flake8
-      run: uv run flake8 src tests --exclude=.venv,build,.eggs  
+      run: uv run flake8 src tests --exclude=.venv,build,.eggs
     - name: Check type hints with mypy
       run: uv run mypy src tests
     - name: Test with pytest
diff --git a/pyproject.toml b/pyproject.toml
index eceacd1..09993c3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -3,7 +3,7 @@ name = "dicomweb-client"
 dynamic = ["version"]
 description = "Client for DICOMweb RESTful services."
 readme = "README.md"
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 authors = [{ name = "Markus D. Herrmann" }]
 maintainers = [
     { name = "Markus D. Herrmann" },
@@ -22,7 +22,6 @@ classifiers = [
     "Topic :: Multimedia :: Graphics",
     "Topic :: Scientific/Engineering :: Information Analysis",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",