blog(post): update note on Python 3.13.0a6

_posts/2024-03-01-python-3-tools-i-use-for-my-python-2-projects-2024-edition.md

@@ -8,7 +8,7 @@ tags:
 - jython
 - python
 date: 2024-03-01 12:56 -0800
-last-updated: 2024-03-01 17:00 -0800
+last-updated: 2024-09-05 17:00 -0700
 ---
 ## TOC
 
@@ -88,7 +88,76 @@ The same thing happened when Python 3.12 was released, but I have recently teste
 
 ~~As of the time of the posting of this article, `mypy[python2]==0.971` fails to install on 3.13.0a4.~~
 
-Update: I just tried installing `mypy[python2]==0.971` using Python 3.13.0a4 and it worked. Securing my GitHub workflows and Azure Pipelines till October 2029.
+~~Update (2024-03-01): I just tried installing `mypy[python2]==0.971` using Python 3.13.0a4 and it worked. Securing my GitHub workflows and Azure Pipelines till October 2029.~~
+
+Update (2024-09-05): Unfortunately Python 3.13 does not allow `mypy[python2]==0.971` to be installed.
+
+Trying to install it results in the following error:
+
+```sh
+$ python -m pip install 'mypy[python2]==0.971'
+Collecting mypy==0.971 (from mypy[python2]==0.971)
+  Downloading mypy-0.971-py3-none-any.whl.metadata (1.8 kB)
+Collecting typing-extensions>=3.10 (from mypy==0.971->mypy[python2]==0.971)
+  Downloading typing_extensions-4.12.2-py3-none-any.whl.metadata (3.0 kB)
+Collecting mypy-extensions>=0.4.3 (from mypy==0.971->mypy[python2]==0.971)
+  Downloading mypy_extensions-1.0.0-py3-none-any.whl.metadata (1.1 kB)
+Collecting typed-ast<2,>=1.4.0 (from mypy[python2]==0.971)
+  Downloading typed_ast-1.5.5.tar.gz (252 kB)
+  Preparing metadata (setup.py) ... done
+Downloading mypy-0.971-py3-none-any.whl (2.6 MB)
+   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 2.6/2.6 MB 17.1 MB/s eta 0:00:00
+Downloading mypy_extensions-1.0.0-py3-none-any.whl (4.7 kB)
+Downloading typing_extensions-4.12.2-py3-none-any.whl (37 kB)
+Building wheels for collected packages: typed-ast
+  Building wheel for typed-ast (setup.py) ... error
+  error: subprocess-exited-with-error
+
+  × python setup.py bdist_wheel did not run successfully.
+  │ exit code: 1
+  ╰─> [30 lines of output]
+      running bdist_wheel
+      running build
+      running build_py
+      creating build
+      creating build/lib.linux-x86_64-cpython-313
+      creating build/lib.linux-x86_64-cpython-313/typed_ast
+      copying typed_ast/ast27.py -> build/lib.linux-x86_64-cpython-313/typed_ast
+      copying typed_ast/conversions.py -> build/lib.linux-x86_64-cpython-313/typed_ast
+      copying typed_ast/ast3.py -> build/lib.linux-x86_64-cpython-313/typed_ast
+      copying typed_ast/__init__.py -> build/lib.linux-x86_64-cpython-313/typed_ast
+      creating build/lib.linux-x86_64-cpython-313/typed_ast/tests
+      copying ast3/tests/test_basics.py -> build/lib.linux-x86_64-cpython-313/typed_ast/tests
+      running build_ext
+      building '_ast27' extension
+      creating build/temp.linux-x86_64-cpython-313
+      creating build/temp.linux-x86_64-cpython-313/ast27
+      creating build/temp.linux-x86_64-cpython-313/ast27/Custom
+      creating build/temp.linux-x86_64-cpython-313/ast27/Parser
+      creating build/temp.linux-x86_64-cpython-313/ast27/Python
+      gcc -fno-strict-overflow -Wsign-compare -DNDEBUG -g -O3 -Wall -fPIC -Iast27/Include -I/usr/local/include/python3.13 -c ast27/Custom/typed_ast.c -o build/temp.linux-x86_64-cpython-313/ast27/Custom/typed_ast.o
+      In file included from /usr/local/include/python3.13/pyport.h:358,
+                       from /usr/local/include/python3.13/Python.h:50,
+                       from ast27/Custom/typed_ast.c:1:
+      ast27/Custom/../Include/compile.h:12:12: error: unknown type name ‘PyFutureFeatures’
+         12 | PyAPI_FUNC(PyFutureFeatures *) PyFuture_FromAST(struct _mod *, const char *);
+            |            ^~~~~~~~~~~~~~~~
+      /usr/local/include/python3.13/exports.h:94:53: note: in definition of macro ‘PyAPI_FUNC’
+         94 | #       define PyAPI_FUNC(RTYPE) Py_EXPORTED_SYMBOL RTYPE
+            |                                                     ^~~~~
+      error: command '/usr/bin/gcc' failed with exit code 1
+      [end of output]
+
+  note: This error originates from a subprocess, and is likely not a problem with pip.
+  ERROR: Failed building wheel for typed-ast
+  Running setup.py clean for typed-ast
+Failed to build typed-ast
+ERROR: ERROR: Failed to build installable wheels for some pyproject.toml based projects (typed-ast)
+```
+
+This is because starting with version 3.13.0a6 `PyFutureFeatures` was moved to an internal header and made private. Breaking installation for all future releases.
+
+This means 3.12 is the last version to allow installation of `mypy[python2]==0.971`, so we will be covered till October 2028.
 
 ## Packaging and publishing