uv add pyqt5 error

[rainzee]

uv pip install pyqt5 works perfectly
but uv add pyqt5 result error:

❯ uv add pyqt5
Resolved 4 packages in 2.78s
error: distribution pyqt5-qt5==5.15.14 @ registry+https://pypi.org/simple can't be installed because it doesn't have a source distribution or wheel for the current platform

uv version uv 0.4.4 (3d75df6ab 2024-09-04)
os windows 10

[rainzee]

I did some digging and found that pyqt5 depends on a package called pyqt5-qt5 which does not support Windows in versions 5.15.11 - 5.15.14, but does support Windows in 5.15.2.

In this case, how to lock dependencies across platforms? In other words, how to avoid errors, after all, there is no problem with normal installation.

[charliermarsh]

This is an inherent problem with distributions that don't ship source distributions, and have limited platform support. We can't guarantee that the set of wheels will cover all the platforms you care about. I'd suggest adding a constraint like:

[tool.uv]
constraint-dependencies = ["pyqt5-qt5 <=5.15.2"]

[charliermarsh]

It's the same problem as #5182, so gonna merge in there.

[rainzee]

So, is this a bug or expected behavior? I tried multiple different package managers(poetry and pdm) and all went wrong, but I felt we could do better, after all, this distribution pattern exists for many popular libraries, so how do we lock down dependencies?

[adam-grant-hendry]

This is an inherent problem with distributions that don't ship source distributions, and have limited platform support. We can't guarantee that the set of wheels will cover all the platforms you care about. I'd suggest adding a constraint like:

[tool.uv]
constraint-dependencies = ["pyqt5-qt5 <=5.15.2"]

Since this is a Windows-only issue, wouldn't it be better to do this?

deps = [
    "pyqt5>=5.15.11; sys_platform != 'win32'",
    "pyqt5<=5.15.2; sys_platform == 'win32'"
]

[adam-grant-hendry]

Note: pyside2 is also not available for python >= 3.11 (PyPI-PySide2)