Require Python 3.11 and add Python 3.15 support

.github/workflows/pythonpackage.yml

@@ -20,7 +20,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13", "3.14"]
+        python-version: ["3.11", "3.12", "3.13", "3.14", "3.15"]
     defaults:
       run:
         shell: bash
@@ -35,18 +35,9 @@ jobs:
           cache: "poetry"
       - name: Install dependencies
         run: poetry install --no-interaction --extras syntax
-        if: ${{ matrix.python-version != '3.9' }}
-      - name: Install dependencies for 3.9
-        run: poetry install --no-interaction
-        if: ${{ matrix.python-version == '3.9' }}
-      - name: Test with pytest (Py310+ - with syntax highlighting)
+      - name: Test with pytest
         run: |
           poetry run pytest tests -v --cov=./src/textual --cov-report=xml:./coverage.xml --cov-report term-missing
-        if: ${{ matrix.python-version != '3.9' }}
-      - name: Test with pytest (Py39 - without syntax highlighting)
-        run: |
-          poetry run pytest tests -v --cov=./src/textual --cov-report=xml:./coverage.xml --cov-report term-missing -m 'not syntax'
-        if: ${{ matrix.python-version == '3.9' }}
       - name: Upload snapshot report
         if: always()
         uses: actions/upload-artifact@v4

docs.md

@@ -1,6 +1,6 @@
 # Documentation Workflow
 
-* Ensure you're inside a *Python 3.10+* virtual environment
+* Ensure you're inside a *Python 3.11+* virtual environment
 * Run the live-reload server using `mkdocs serve` from the project root
 * Create new pages by adding new directories and Markdown files inside `docs/*`
 

docs/getting_started.md

@@ -3,7 +3,7 @@ All you need to get started building Textual apps.
 
 ## Requirements
 
-Textual requires Python 3.9 or later (if you have a choice, pick the most recent Python). Textual runs on Linux, macOS, Windows and probably any OS where Python also runs. 
+Textual requires Python 3.11 or later (if you have a choice, pick the most recent Python). Textual runs on Linux, macOS, Windows and probably any OS where Python also runs.
 
 !!! info "Your platform"