feat: drop Python 3.9 support metadata and CI matrix

Agent-Logs-Url: https://github.com/microsoftgraph/msgraph-sdk-python/sessions/b149b291-3ae9-47a9-9cdd-311077bdd577

Co-authored-by: ramsessanchez <63934382+ramsessanchez@users.noreply.github.com>

Author: Copilot

.devcontainer/devcontainer.json

@@ -3,7 +3,6 @@
 {
   "name": "Python 3",
   // Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
-  // "image": "mcr.microsoft.com/devcontainers/python:3.9-bookworm",
   // "image": "mcr.microsoft.com/devcontainers/python:3.10-bookworm",
   // "image": "mcr.microsoft.com/devcontainers/python:3.11-bookworm",
   // "image": "mcr.microsoft.com/devcontainers/python:3.12-bookworm",

.github/workflows/build.yml

@@ -15,7 +15,7 @@ jobs:
     strategy:
       max-parallel: 5
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.10", "3.11", "3.12", "3.13"]
     steps:
     - uses: actions/checkout@v6
     - name: Set up Python ${{ matrix.python-version }}
@@ -42,4 +42,3 @@ jobs:
       - name: One or more build matrix options failed
         if: ${{ contains(needs.*.result, 'failure') }}
         run: exit 1
-

README.md

@@ -19,6 +19,7 @@ pip install msgraph-sdk
 
 > **Note:**
 >
+> * This library supports Python 3.10+.
 > * The Microsoft Graph SDK for Python is a fairly large package. It may take a few minutes for the initial installation to complete.
 > * Enable long paths in your environment if you receive a `Could not install packages due to an OSError`. For details, see [Enable Long Paths in Windows 10, Version 1607, and Later](https://learn.microsoft.com/en-us/windows/win32/fileio/maximum-file-path-limitation?tabs=powershell#enable-long-paths-in-windows-10-version-1607-and-later).
 

pyproject.toml

@@ -19,14 +19,13 @@ dependencies = [
     "msgraph_core >=1.3.1"
 
 ]
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 license = "MIT"
 license-files = ["LICENSE"]
 readme = "README.md"
 keywords = ["msgraph", "openAPI", "Microsoft", "Graph"]
 classifiers = [
     "Development Status :: 5 - Production/Stable",
-    "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",