Python 3.9 is not supported, yet. I have opened #1264 to see whether the tests pass, but neither Travis nor Appveyor has Python 3.9 available at this time. Once that is the case, we'll look into it for master. If the changes required are trivial, I'll backport them to the 2.5 branch.

Ok, thanks for the update!

Travis and Appveyor have 3.9 now.

Looks like this can be closed. Looking forward for a new release of pythonnet with support for Python 3.9, thanks!

Is pythonnet available for 3.9.x now? If yes, does it support 3.9.5?

Officially not, see #1389 for example.

When can we expect an official release of pythonnet available for Python 3.9.0? None of the solutions provided is working on my Windows 10.

Hi @Sshankar7, Please try 2.5.2.0. I tried along with Python 3.9.5 and it's working.

It's November 2021 and the pythonnet library still does not officially support 3.9 yet despite a commit in October that mentioned 3.10 compatibility... does this issue need to be reopened?

It's November 2021 and the pythonnet library still does not officially support 3.9 yet despite a commit in October that mentioned 3.10 compatibility... does this issue need to be reopened?

Not yet. A pip install still errors out on Python 3.9.6.

This looks like it needs to be reopened because there is no 3.9 support on pypi.org.

In an unsecure workaround people are using it by downloading a wheel file from an .edu site:
https://stackoverflow.com/questions/67418533/how-to-fix-error-during-pythonnet-installation

There's now 3.0.0a1 package available with 3.9 support

There's now 3.0.0a1 package available with 3.9 support

Not really? Looking on pypi.org it's the same 2.5.2 from Feb 5, 2021 (https://pypi.org/project/pythonnet/). Is there some disconnect in how this package gets released?

@Richard944 https://pypi.org/project/pythonnet/#history

BTW, @filmor , there's no alpha for 3.10. Do we have anything blocking it?

There's now 3.0.0a1 package available with 3.9 support

Not really? Looking on pypi.org it's the same 2.5.2 from Feb 5, 2021 (https://pypi.org/project/pythonnet/). Is there some disconnect in how this package gets released?

You can install pre releases with

pip install --pre pythonnet

See https://pip.pypa.io/en/stable/cli/pip_install/#pre-release-versions

@Richard944 https://pypi.org/project/pythonnet/#history

BTW, @filmor , there's no alpha for 3.10. Do we have anything blocking it?

"PRE-RELEASE" Thanks!

@Richard944 https://pypi.org/project/pythonnet/#history

BTW, @filmor , there's no alpha for 3.10. Do we have anything blocking it?

No, this is just a mistake in the metadata. I'll fix it tomorrow.

I'm finding that pythonnet 3.0.0a1 works and pythonnet 3.0.0a2 does not work. There must be some difference. I am running a 3.9.6 python virtual environment.

With both versions I see the dll in site-packages\pythonnet\runtime.

...venv_amd64_3.9.6\lib\site-packages\pythonnet_init_.py:44: in load
raise RuntimeError("Failed to initialize Python.Runtime.dll")
E RuntimeError: Failed to initialize Python.Runtime.dll

I'm ok using 3.0.0a1 but I wanted to share what I saw.

I'm finding that pythonnet 3.0.0a1 works and pythonnet 3.0.0a2 does not work. There must be some difference. I am running a 3.9.6 python virtual environment.

With both versions I see the dll in site-packages\pythonnet\runtime.

...venv_amd64_3.9.6\lib\site-packages\pythonnet__init__.py:44: in load raise RuntimeError("Failed to initialize Python.Runtime.dll") E RuntimeError: Failed to initialize Python.Runtime.dll

I'm ok using 3.0.0a1 but I wanted to share what I saw.

@Richard944 I recommend opening a separate issue for this error.

The pre-release version can now also be installed via conda by executing

conda install -c conda-forge/label/pythonnet_dev -c conda-forge pythonnet