Drop support for Python 3.9.

tobiasraabe · tobiasraabe · commit 1df5d1c60a65 · 2025-10-12T21:11:02.000+02:00
Python 3.9 has reached end of life. Update minimum Python version
to 3.10 in pyproject.toml, CI configuration, and all documentation
examples.
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
@@ -39,7 +39,7 @@ jobs:
       fail-fast: false
       matrix:
         os: ['ubuntu-latest', 'macos-latest', 'windows-latest']
-        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@v5
@@ -63,7 +63,7 @@ jobs:
         uses: codecov/codecov-action@v5
 
       - name: Run tests with lowest resolution
-        if: matrix.python-version == '3.9' && matrix.os == 'ubuntu-latest'
+        if: matrix.python-version == '3.10' && matrix.os == 'ubuntu-latest'
         run: just test-lowest
 
       - name: Run tests with highest resolution
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -9,6 +9,8 @@ releases are available on [PyPI](https://pypi.org/project/pytask) and
 
 - {pull}`703` fixes {issue}`701` by allowing `--capture tee-sys` again.
 - {pull}`704` adds the `--explain` flag to show why tasks would be executed. Closes {issue}`466`.
+- {pull}`706` disables syntax highlighting for platform version information in session header.
+- {pull}`707` drops support for Python 3.9 as it has reached end of life.
 
 ## 0.5.5 - 2025-07-25
 
diff --git a/docs/source/_static/md/capture.md b/docs/source/_static/md/capture.md
@@ -4,7 +4,7 @@
 
 $ pytask
 ────────────────────────── Start pytask session ─────────────────────────
-Platform: win32 -- Python <span style="color: var(--termynal-blue)">3.12.0</span>, pytask <span style="color: var(--termynal-blue)">0.5.3</span>, pluggy <span style="color: var(--termynal-blue)">1.3.0</span>
+Platform: win32 -- Python 3.12.0, pytask 0.5.3, pluggy 1.3.0
 Root: C:\Users\pytask-dev\git\my_project
 Collected 2 tasks.
 
diff --git a/docs/source/_static/md/clean-dry-run-directories.md b/docs/source/_static/md/clean-dry-run-directories.md
@@ -4,7 +4,7 @@
 
 $ pytask clean --directories
 ────────────────────────── Start pytask session ─────────────────────────
-Platform: win32 -- Python <span style="color: var(--termynal-blue)">3.12.0</span>, pytask <span style="color: var(--termynal-blue)">0.5.3</span>, pluggy <span style="color: var(--termynal-blue)">1.3.0</span>
+Platform: win32 -- Python 3.12.0, pytask 0.5.3, pluggy 1.3.0
 Root: C:\Users\pytask-dev\git\my_project
 Collected 1 task.
 
diff --git a/docs/source/_static/md/clean-dry-run.md b/docs/source/_static/md/clean-dry-run.md
@@ -4,7 +4,7 @@
 
 $ pytask clean
 ────────────────────────── Start pytask session ─────────────────────────
-Platform: win32 -- Python <span style="color: var(--termynal-blue)">3.12.0</span>, pytask <span style="color: var(--termynal-blue)">0.5.3</span>, pluggy <span style="color: var(--termynal-blue)">1.3.0</span>
+Platform: win32 -- Python 3.12.0, pytask 0.5.3, pluggy 1.3.0
 Root: C:\Users\pytask-dev\git\my_project
 Collected 1 task.
 
diff --git a/docs/source/_static/md/collect-nodes.md b/docs/source/_static/md/collect-nodes.md
@@ -4,7 +4,7 @@
 
 $ pytask
 ────────────────────────── Start pytask session ─────────────────────────
-Platform: win32 -- Python <span style="color: var(--termynal-blue)">3.12.0</span>, pytask <span style="color: var(--termynal-blue)">0.5.3</span>, pluggy <span style="color: var(--termynal-blue)">1.3.0</span>
+Platform: win32 -- Python 3.12.0, pytask 0.5.3, pluggy 1.3.0
 Root: C:\Users\pytask-dev\git\my_project
 Collected 1 task.
 
diff --git a/docs/source/_static/md/collect.md b/docs/source/_static/md/collect.md
@@ -4,7 +4,7 @@
 
 $ pytask
 ────────────────────────── Start pytask session ─────────────────────────
-Platform: win32 -- Python <span style="color: var(--termynal-blue)">3.12.0</span>, pytask <span style="color: var(--termynal-blue)">0.5.3</span>, pluggy <span style="color: var(--termynal-blue)">1.3.0</span>
+Platform: win32 -- Python 3.12.0, pytask 0.5.3, pluggy 1.3.0
 Root: C:\Users\pytask-dev\git\my_project
 Collected 1 task.
 
diff --git a/docs/source/_static/md/defining-dependencies-products.md b/docs/source/_static/md/defining-dependencies-products.md
@@ -4,7 +4,7 @@
 
 $ pytask
 ────────────────────────── Start pytask session ─────────────────────────
-Platform: win32 -- Python <span style="color: var(--termynal-blue)">3.12.0</span>, pytask <span style="color: var(--termynal-blue)">0.5.3</span>, pluggy <span style="color: var(--termynal-blue)">1.3.0</span>
+Platform: win32 -- Python 3.12.0, pytask 0.5.3, pluggy 1.3.0
 Root: C:\Users\pytask-dev\git\my_project
 Collected 2 task.
 
diff --git a/docs/source/_static/md/dry-run.md b/docs/source/_static/md/dry-run.md
@@ -4,7 +4,7 @@
 
 $ pytask --dry-run
 ────────────────────────── Start pytask session ─────────────────────────
-Platform: win32 -- Python <span style="color: var(--termynal-blue)">3.12.0</span>, pytask <span style="color: var(--termynal-blue)">0.5.3</span>, pluggy <span style="color: var(--termynal-blue)">1.3.0</span>
+Platform: win32 -- Python 3.12.0, pytask 0.5.3, pluggy 1.3.0
 Root: C:\Users\pytask-dev\git\my_project
 Collected 1 task.
 
diff --git a/docs/source/_static/md/explain.md b/docs/source/_static/md/explain.md
@@ -4,7 +4,7 @@
 
 $ pytask --explain
 ────────────────────────── Start pytask session ─────────────────────────
-Platform: darwin -- Python <span style="color: var(--termynal-blue)">3.12.0</span>, pytask <span style="color: var(--termynal-blue)">0.5.6</span>, pluggy <span style="color: var(--termynal-blue)">1.6.0</span>
+Platform: darwin -- Python 3.12.0, pytask 0.5.6, pluggy 1.6.0
 Root: /Users/pytask-dev/git/my_project
 Collected 3 tasks.
 
diff --git a/docs/source/_static/md/migrating-from-scripts-to-pytask.md b/docs/source/_static/md/migrating-from-scripts-to-pytask.md
@@ -4,7 +4,7 @@
 
 $ pytask
 ────────────────────────── Start pytask session ─────────────────────────
-Platform: win32 -- Python <span style="color: var(--termynal-blue)">3.12.0</span>, pytask <span style="color: var(--termynal-blue)">0.5.3</span>, pluggy <span style="color: var(--termynal-blue)">1.3.0</span>
+Platform: win32 -- Python 3.12.0, pytask 0.5.3, pluggy 1.3.0
 Root: C:\Users\pytask-dev\git\my_project
 Collected 1 task.
 
diff --git a/docs/source/_static/md/pdb.md b/docs/source/_static/md/pdb.md
@@ -4,7 +4,7 @@
 
 $ pytask --pdb
 ────────────────────────── Start pytask session ─────────────────────────
-Platform: win32 -- Python <span style="color: var(--termynal-blue)">3.12.0</span>, pytask <span style="color: var(--termynal-blue)">0.5.3</span>, pluggy <span style="color: var(--termynal-blue)">1.3.0</span>
+Platform: win32 -- Python 3.12.0, pytask 0.5.3, pluggy 1.3.0
 Root: C:\Users\pytask-dev\git\my_project
 Collected 1 task.
 
diff --git a/docs/source/_static/md/persist-executed.md b/docs/source/_static/md/persist-executed.md
@@ -4,7 +4,7 @@
 
 $ pytask
 ────────────────────────── Start pytask session ─────────────────────────
-Platform: win32 -- Python <span style="color: var(--termynal-blue)">3.12.0</span>, pytask <span style="color: var(--termynal-blue)">0.5.3</span>, pluggy <span style="color: var(--termynal-blue)">1.3.0</span>
+Platform: win32 -- Python 3.12.0, pytask 0.5.3, pluggy 1.3.0
 Root: C:\Users\pytask-dev\git\my_project
 Collected 1 task.
 
diff --git a/docs/source/_static/md/persist-persisted.md b/docs/source/_static/md/persist-persisted.md
@@ -4,7 +4,7 @@
 
 $ pytask
 ────────────────────────── Start pytask session ─────────────────────────
-Platform: win32 -- Python <span style="color: var(--termynal-blue)">3.12.0</span>, pytask <span style="color: var(--termynal-blue)">0.5.3</span>, pluggy <span style="color: var(--termynal-blue)">1.3.0</span>
+Platform: win32 -- Python 3.12.0, pytask 0.5.3, pluggy 1.3.0
 Root: C:\Users\pytask-dev\git\my_project
 Collected 1 task.
 
diff --git a/docs/source/_static/md/persist-skipped.md b/docs/source/_static/md/persist-skipped.md
@@ -4,7 +4,7 @@
 
 $ pytask --verbose 2
 ────────────────────────── Start pytask session ─────────────────────────
-Platform: win32 -- Python <span style="color: var(--termynal-blue)">3.12.0</span>, pytask <span style="color: var(--termynal-blue)">0.5.3</span>, pluggy <span style="color: var(--termynal-blue)">1.3.0</span>
+Platform: win32 -- Python 3.12.0, pytask 0.5.3, pluggy 1.3.0
 Root: C:\Users\pytask-dev\git\my_project
 Collected 1 task.
 
diff --git a/docs/source/_static/md/profiling-tasks.md b/docs/source/_static/md/profiling-tasks.md
@@ -4,7 +4,7 @@
 
 $ pytask profile
 ───────────────────────── Start pytask session ─────────────────────────
-Platform: win32 -- Python <span style="color: var(--termynal-blue)">3.12.0</span>, pytask <span style="color: var(--termynal-blue)">0.5.3</span>, pluggy <span style="color: var(--termynal-blue)">1.3.0</span>
+Platform: win32 -- Python 3.12.0, pytask 0.5.3, pluggy 1.3.0
 Root: C:\Users\pytask-dev\git\my_project
 Collected 18 task.
 
diff --git a/docs/source/_static/md/readme.md b/docs/source/_static/md/readme.md
@@ -4,7 +4,7 @@
 
 $ pytask
 ──────────────────────────── Start pytask session ────────────────────────────
-Platform: win32 -- Python <span style="color: var(--termynal-blue)">3.12.0</span>, pytask <span style="color: var(--termynal-blue)">0.5.3</span>, pluggy <span style="color: var(--termynal-blue)">1.3.0</span>
+Platform: win32 -- Python 3.12.0, pytask 0.5.3, pluggy 1.3.0
 Root: C:\Users\pytask-dev\git\my_project
 Collected 1 task.
 
diff --git a/docs/source/_static/md/repeating-tasks.md b/docs/source/_static/md/repeating-tasks.md
@@ -4,7 +4,7 @@
 
 $ pytask
 ────────────────────────── Start pytask session ─────────────────────────
-Platform: win32 -- Python <span style="color: var(--termynal-blue)">3.12.0</span>, pytask <span style="color: var(--termynal-blue)">0.5.3</span>, pluggy <span style="color: var(--termynal-blue)">1.3.0</span>
+Platform: win32 -- Python 3.12.0, pytask 0.5.3, pluggy 1.3.0
 Root: C:\Users\pytask-dev\git\my_project
 Collected 10 task.
 
diff --git a/docs/source/_static/md/show-locals.md b/docs/source/_static/md/show-locals.md
@@ -4,7 +4,7 @@
 
 $ pytask --show-locals
 ──────────────────────────── Start pytask session ────────────────────────────
-Platform: win32 -- Python <span style="color: var(--termynal-blue)">3.12.0</span>, pytask <span style="color: var(--termynal-blue)">0.5.3</span>, pluggy <span style="color: var(--termynal-blue)">1.3.0</span>
+Platform: win32 -- Python 3.12.0, pytask 0.5.3, pluggy 1.3.0
 Root: C:\Users\pytask-dev\git\my_project
 Collected 1 task.
 
diff --git a/docs/source/_static/md/trace.md b/docs/source/_static/md/trace.md
@@ -4,7 +4,7 @@
 
 $ pytask --trace
 ──────────────────────────── Start pytask session ────────────────────────────
-Platform: win32 -- Python <span style="color: var(--termynal-blue)">3.12.0</span>, pytask <span style="color: var(--termynal-blue)">0.5.3</span>, pluggy <span style="color: var(--termynal-blue)">1.3.0</span>
+Platform: win32 -- Python 3.12.0, pytask 0.5.3, pluggy 1.3.0
 Root: C:\Users\pytask-dev\git\my_project
 Collected 1 task.
 
diff --git a/docs/source/_static/md/try-first.md b/docs/source/_static/md/try-first.md
@@ -4,7 +4,7 @@
 
 $ pytask -s
 ────────────────────────── Start pytask session ─────────────────────────
-Platform: win32 -- Python <span style="color: var(--termynal-blue)">3.12.0</span>, pytask <span style="color: var(--termynal-blue)">0.5.3</span>, pluggy <span style="color: var(--termynal-blue)">1.3.0</span>
+Platform: win32 -- Python 3.12.0, pytask 0.5.3, pluggy 1.3.0
 Root: C:\Users\pytask-dev\git\my_project
 Collected 2 task.
 
diff --git a/docs/source/_static/md/try-last.md b/docs/source/_static/md/try-last.md
@@ -4,7 +4,7 @@
 
 $ pytask -s
 ────────────────────────── Start pytask session ────────────────────────
-Platform: win32 -- Python <span style="color: var(--termynal-blue)">3.12.0</span>, pytask <span style="color: var(--termynal-blue)">0.5.3</span>, pluggy <span style="color: var(--termynal-blue)">1.3.0</span>
+Platform: win32 -- Python 3.12.0, pytask 0.5.3, pluggy 1.3.0
 Root: C:\Users\pytask-dev\git\my_project
 Collected 2 task.
 
diff --git a/docs/source/_static/md/warning.md b/docs/source/_static/md/warning.md
@@ -4,7 +4,7 @@
 
 $ pytask
 ────────────────────────── Start pytask session ─────────────────────────
-Platform: win32 -- Python <span style="color: var(--termynal-blue)">3.12.0</span>, pytask <span style="color: var(--termynal-blue)">0.5.3</span>, pluggy <span style="color: var(--termynal-blue)">1.3.0</span>
+Platform: win32 -- Python 3.12.0, pytask 0.5.3, pluggy 1.3.0
 Root: C:\Users\pytask-dev\git\my_project
 Collected 1 task.
 
diff --git a/docs/source/_static/md/write-a-task.md b/docs/source/_static/md/write-a-task.md
@@ -4,7 +4,7 @@
 
 $ pytask
 ────────────────────────── Start pytask session ─────────────────────────
-Platform: win32 -- Python <span style="color: var(--termynal-blue)">3.12.0</span>, pytask <span style="color: var(--termynal-blue)">0.5.3</span>, pluggy <span style="color: var(--termynal-blue)">1.3.0</span>
+Platform: win32 -- Python 3.12.0, pytask 0.5.3, pluggy 1.3.0
 Root: C:\Users\pytask-dev\git\my_project
 Collected 1 task.
 
diff --git a/docs/source/how_to_guides/using_task_returns.md b/docs/source/how_to_guides/using_task_returns.md
@@ -26,7 +26,7 @@ defines where the return of the function, a string, should be stored.
 
 ````
 
-````{tab-item} Python 3.9
+````{tab-item} Python 3.10
 :sync: python38plus
 
 ```{literalinclude} ../../../docs_src/how_to_guides/using_task_returns_example_1_py38.py
@@ -68,7 +68,7 @@ of the previous interfaces.
 
 ````
 
-````{tab-item} Python 3.9
+````{tab-item} Python 3.10
 :sync: python38plus
 
 ```{literalinclude} ../../../docs_src/how_to_guides/using_task_returns_example_3_py38.py
@@ -103,7 +103,7 @@ mapped to the defined nodes.
 
 ````
 
-````{tab-item} Python 3.9
+````{tab-item} Python 3.10
 :sync: python38plus
 
 ```{literalinclude} ../../../docs_src/how_to_guides/using_task_returns_example_4_py38.py
diff --git a/docs/source/how_to_guides/writing_custom_nodes.md b/docs/source/how_to_guides/writing_custom_nodes.md
@@ -42,15 +42,15 @@ The result will be the following task.
 
 ````
 
-````{tab-item} Python 3.9
+````{tab-item} Python 3.10
 :sync: python38plus
 
 ```{literalinclude} ../../../docs_src/how_to_guides/writing_custom_nodes_example_2_py38.py
 ```
 
 ````
 
-````{tab-item} Python 3.9 & Return
+````{tab-item} Python 3.10 & Return
 :sync: python38plus
 
 ```{literalinclude} ../../../docs_src/how_to_guides/writing_custom_nodes_example_2_py38_return.py
@@ -87,7 +87,7 @@ we arrive at the following class.
 
 ````
 
-````{tab-item} Python 3.9
+````{tab-item} Python 3.10
 :sync: python38plus
 
 ```{literalinclude} ../../../docs_src/how_to_guides/writing_custom_nodes_example_3_py38.py
diff --git a/docs/source/tutorials/defining_dependencies_products.md b/docs/source/tutorials/defining_dependencies_products.md
@@ -5,8 +5,7 @@ Define task dependencies and products to run your tasks.
 Defining dependencies and products also determines task execution order.
 
 This tutorial offers you different interfaces. For type annotations, see the
-`Python 3.10+` or `3.9` tabs. You find a tutorial on type hints
-{doc}`here <../type_hints>`.
+`Python 3.10+` tabs. You find a tutorial on type hints {doc}`here <../type_hints>`.
 
 If you want to avoid type annotations for now, look at the tab named `produces`.
 
@@ -59,7 +58,7 @@ task has finished, pytask will check whether the file exists.
 
 ````
 
-````{tab-item} Python 3.9
+````{tab-item} Python 3.10
 :sync: python38plus
 
 ```{literalinclude} ../../../docs_src/tutorials/defining_dependencies_products_products_py38.py
@@ -116,7 +115,7 @@ annotation are dependencies of the task.
 
 ````
 
-````{tab-item} Python 3.9
+````{tab-item} Python 3.10
 :sync: python38plus
 
 To specify the task relies on `data.pkl`, add the path
@@ -168,7 +167,7 @@ are assumed to point to a location relative to the task module.
 
 ````
 
-````{tab-item} Python 3.9
+````{tab-item} Python 3.10
 :sync: python38plus
 
 ```{literalinclude} ../../../docs_src/tutorials/defining_dependencies_products_relative_py38.py
@@ -208,7 +207,7 @@ structures if needed.
 
 ````
 
-````{tab-item} Python 3.9
+````{tab-item} Python 3.10
 :sync: python38plus
 
 ```{literalinclude} ../../../docs_src/tutorials/defining_dependencies_products_multiple1_py38.py
diff --git a/docs/source/tutorials/repeating_tasks_with_different_inputs.md b/docs/source/tutorials/repeating_tasks_with_different_inputs.md
@@ -21,7 +21,7 @@ different seeds and output paths as default arguments of the function.
 
 ````
 
-````{tab-item} Python 3.9
+````{tab-item} Python 3.10
 :sync: python38plus
 
 ```{literalinclude} ../../../docs_src/tutorials/repeating_tasks_with_different_inputs1_py38.py
@@ -57,7 +57,7 @@ You can also add dependencies to repeated tasks just like with any other task.
 
 ````
 
-````{tab-item} Python 3.9
+````{tab-item} Python 3.10
 :sync: python38plus
 
 ```{literalinclude} ../../../docs_src/tutorials/repeating_tasks_with_different_inputs2_py38.py
@@ -117,7 +117,7 @@ For example, the following function is parametrized with tuples.
 
 ````
 
-````{tab-item} Python 3.9
+````{tab-item} Python 3.10
 :sync: python38plus
 
 ```{literalinclude} ../../../docs_src/tutorials/repeating_tasks_with_different_inputs3_py38.py
@@ -158,7 +158,7 @@ a unique name for the iteration.
 
 ````
 
-````{tab-item} Python 3.9
+````{tab-item} Python 3.10
 :sync: python38plus
 
 ```{literalinclude} ../../../docs_src/tutorials/repeating_tasks_with_different_inputs4_py38.py
@@ -244,7 +244,7 @@ Following these three tips, the parametrization becomes
 
 ````
 
-````{tab-item} Python 3.9
+````{tab-item} Python 3.10
 :sync: python38plus
 
 ```{literalinclude} ../../../docs_src/tutorials/repeating_tasks_with_different_inputs5_py38.py
diff --git a/docs/source/tutorials/set_up_a_project.md b/docs/source/tutorials/set_up_a_project.md
diff --git a/docs/source/tutorials/using_a_data_catalog.md b/docs/source/tutorials/using_a_data_catalog.md
diff --git a/docs/source/tutorials/write_a_task.md b/docs/source/tutorials/write_a_task.md
diff --git a/pyproject.toml b/pyproject.toml
diff --git a/src/_pytask/logging.py b/src/_pytask/logging.py
