MyPy install fails after upgrade to python 3.9.0

[pjljvandelaar]

Today I installed mypy under python 3.8.5 - no problem
then I updated to python 3.9.0, and installation of mypy fails:

PS C:\Users\laarpjljvd> pip install mypy
Collecting mypy
  Using cached mypy-0.790-py3-none-any.whl (2.4 MB)
Collecting typing-extensions>=3.7.4
  Using cached typing_extensions-3.7.4.3-py3-none-any.whl (22 kB)
Collecting typed-ast<1.5.0,>=1.4.0
  Using cached typed_ast-1.4.1.tar.gz (208 kB)
Collecting mypy-extensions<0.5.0,>=0.4.3
  Using cached mypy_extensions-0.4.3-py2.py3-none-any.whl (4.5 kB)
Using legacy 'setup.py install' for typed-ast, since package 'wheel' is not installed.
Installing collected packages: typing-extensions, typed-ast, mypy-extensions, mypy
    Running setup.py install for typed-ast ... error
    ERROR: Command errored out with exit status 1:
     command: 'c:\users\laarpjljvd\appdata\local\programs\python\python39\python.exe' -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\\Users\\laarpjljvd\\AppData\\Local\\Temp\\pip-install-2a6r9tqw\\typed-ast\\setup.py'"'"'; __file__='"'"'C:\\Users\\laarpjljvd\\AppData\\Local\\Temp\\pip-install-2a6r9tqw\\typed-ast\\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record 'C:\Users\laarpjljvd\AppData\Local\Temp\pip-record-kl5fc1ru\install-record.txt' --single-version-externally-managed --compile --install-headers 'c:\users\laarpjljvd\appdata\local\programs\python\python39\Include\typed-ast'
         cwd: C:\Users\laarpjljvd\AppData\Local\Temp\pip-install-2a6r9tqw\typed-ast\
    Complete output (16 lines):
    running install
    running build
    running build_py
    creating build
    creating build\lib.win-amd64-3.9
    creating build\lib.win-amd64-3.9\typed_ast
    copying typed_ast\ast27.py -> build\lib.win-amd64-3.9\typed_ast
    copying typed_ast\ast3.py -> build\lib.win-amd64-3.9\typed_ast
    copying typed_ast\conversions.py -> build\lib.win-amd64-3.9\typed_ast
    copying typed_ast\__init__.py -> build\lib.win-amd64-3.9\typed_ast
    package init file 'ast3\tests\__init__.py' not found (or not a regular file)
    creating build\lib.win-amd64-3.9\typed_ast\tests
    copying ast3\tests\test_basics.py -> build\lib.win-amd64-3.9\typed_ast\tests
    running build_ext
    building '_ast27' extension
    error: Microsoft Visual C++ 14.0 is required. Get it with "Build Tools for Visual Studio": https://visualstudio.microsoft.com/downloads/
    ----------------------------------------
ERROR: Command errored out with exit status 1: 'c:\users\laarpjljvd\appdata\local\programs\python\python39\python.exe' -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\\Users\\laarpjljvd\\AppData\\Local\\Temp\\pip-install-2a6r9tqw\\typed-ast\\setup.py'"'"'; __file__='"'"'C:\\Users\\laarpjljvd\\AppData\\Local\\Temp\\pip-install-2a6r9tqw\\typed-ast\\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record 'C:\Users\laarpjljvd\AppData\Local\Temp\pip-record-kl5fc1ru\install-record.txt' --single-version-externally-managed --compile --install-headers 'c:\users\laarpjljvd\appdata\local\programs\python\python39\Include\typed-ast' Check the logs for full command output.
PS C:\Users\laarpjljvd>

[pjljvandelaar]

Note: I have the following C++ installed and that was always more than enough:

[pjljvandelaar]

Seems like an issue in typed-ast.
See python/typed_ast#146
Typed-ast will not support python > 3.8, so mypy should look for an alternative?

[hauntsaninja]

Thanks, duplicate of #9488