Please publish release with packages for all platforms for PyQt5-Qt5

[konstin]

On 19.09.25 23:18, Phil Thompson wrote:
> On 19/09/2025 09:43, konstin wrote:
>> Hi,
>>
>> I have a request regarding the packaging of PyQt5-Qt5 on PyPI.
>>
>> Packaging tools such as uv or poetry resolve the user's dependencies,
>> and then write the versions to a platform-independent lockfile. This
>> is built under the assumption that a version can be used on any
>> supported platform.
>
> IMHO that is a really dumb assumption. Different platforms have 
> different capabilities. Different projects have different levels of 
> support on different platforms.
>
> I understand that these tools are trying to create a cross-platform 
> environment, but there has to be cases where this is (for good 
> reasons) not possible. At the very least they should be able to see if 
> there is a set of versions that is able to meet the cross-platform 
> requirements (which there is in this case).

I'm with you on this, and the resolver algorithms take this into 
account, for example when there's a conditional dependency to only use 
pywin32 in Windows. It's also supported to have e.g. ML applications 
that only run on Linux. There are also cases where this approach fails, 
notably when packages drop support for older platforms in newer 
releases. For PyQt5-Qt5, the trouble is that the platform support is 
split between multiple versions, all compatible with the user's 
requirements file. I'm aware of only two packages for which this is the 
case, that's why I decided to contact those two projects directly.

>> PyQt5-Qt5 breaks this assumption as different versions have wheels for
>> different platforms. For example, 5.15.2 has Windows wheels, while
>> 5.15.17 has Linux and macOS wheels. Without a source distributions,
>> package managers can't build missing wheels for a version. This leads
>> to regular questions from users of both uv and poetry, see
>> https://github.com/astral-sh/uv/issues?q=is%3Aissue%20%20pyqt5 and
>> https://github.com/python-poetry/poetry/issues?q=is%3Aissue%20pyqt5,
>> who get errors where the dependency resolution works, but installation
>> fails because wheels are missing.
>>
>> Would it be possible to always publish wheels for all supported
>> platforms for PyQt5-Qt5?
>
> The reason the Windows wheels are based on an older version of Qt is 
> that I haven’t yet put the effort into building from source. I plan to 
> get around to it at some point but it’s not a priority.
>
I totally understand that external build tooling related problems are 
hard to prioritize.