Windows系统无法直接用uv安装pyqt5，但可以用uv pip安装

1. 问题

问题：执行uv add pyqt5时安装失败：

vbnet 复制代码

Resolved 144 packages in 6.34s
error: Distribution `pyqt5-qt5==5.15.18 @ registry+https://pypi.org/simple` can't be installed because it doesn't have a source distribution or wheel for the current platform

hint: You're on Windows (`win_amd64`), but `pyqt5-qt5` (v5.15.18) only has wheels for the following platforms: `manylinux2014_x86_64`, `macosx_10_13_x86_64`, `macosx_11_0_arm64`; consider adding your platform to `tool.uv.required-environments` to ensure uv resolves to a version with compatible wheels

如果在pyproject.toml中直接写入pyqt5的话，执行uv sync时会这么报错：

arduino 复制代码

Resolved 145 packages in 1.78s
  × Failed to build `pyqt5==5.15.2`
  ├─▶ The build backend returned an error                                           
  ╰─▶ Call to `sipbuild.api.build_wheel` failed (exit code: 1)

      [stderr]
      pyproject.toml: line 7: using '[tool.sip.metadata]' to specify the project    
      metadata is deprecated and will be removed in SIP v7.0.0, use '[project]'     
      instead
      Traceback (most recent call last):
        File "<string>", line 11, in <module>
          wheel_filename =
      backend.build_wheel("D:\\all_applications\\foruv\\foruvcache\\builds-v0\\.tmpdm8CqW",
      {}, None)
        File
      "D:\all_applications\foruv\foruvcache\builds-v0\.tmpywcL19\Lib\site-packages\sipbuild\api.py",
      line 28, in build_wheel
          project = AbstractProject.bootstrap('wheel',
                  arguments=_convert_config_settings(config_settings))
        File
      "D:\all_applications\foruv\foruvcache\builds-v0\.tmpywcL19\Lib\site-packages\sipbuild\abstract_project.py",
      line 74, in bootstrap
          project.setup(pyproject, tool, tool_description)
          ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File
      "D:\all_applications\foruv\foruvcache\builds-v0\.tmpywcL19\Lib\site-packages\sipbuild\project.py",
      line 661, in setup
          self.apply_user_defaults(tool)
          ~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^
        File
      "D:\all_applications\foruv\foruvcache\sdists-v9\pypi\pyqt5\5.15.2\DCnXDNUwgyaPDx3Z6cidl\src\project.py",
      line 63, in apply_user_defaults
          super().apply_user_defaults(tool)
          ~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^
        File
      "D:\all_applications\foruv\foruvcache\builds-v0\.tmpywcL19\Lib\site-packages\pyqtbuild\project.py",
      line 51, in apply_user_defaults
          super().apply_user_defaults(tool)
          ~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^
        File
      "D:\all_applications\foruv\foruvcache\builds-v0\.tmpywcL19\Lib\site-packages\sipbuild\project.py",
      line 248, in apply_user_defaults
          self.builder.apply_user_defaults(tool)
          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^
        File
      "D:\all_applications\foruv\foruvcache\builds-v0\.tmpywcL19\Lib\site-packages\pyqtbuild\builder.py",
      line 49, in apply_user_defaults
          raise PyProjectOptionException('qmake',
                  "specify a working qmake or add it to PATH")
      sipbuild.pyproject.PyProjectOptionException

      hint: This usually indicates a problem with the package or the build
      environment.
  help: `pyqt5` (v5.15.2) was included because `paid-column1` (v0.1.0) depends      
        on `pyqt5`

2. 原因

原因出在pyqt5官方，他家就限制了最新版pyqt5依赖的pyqt5-qt5包不能在Windows平台上装。

3. 解决方案

我最终成功的解决方案是先uv sync再uv pip install pyqt5。注意如果反过来会把环境改回pyproject.toml的环境，但我觉得uv速度这么快你每次都来一遍也没有关系：

ini 复制代码

Using Python 3.13.7 environment at: D:\Codes\uv_environment\example\.venv
Resolved 3 packages in 12.74s
Prepared 2 packages in 49.63s
Installed 3 packages in 296ms
 + pyqt5==5.15.11                                                                   
 + pyqt5-qt5==5.15.2
 + pyqt5-sip==12.17.2

其他提到的可能有用的解决方案：

uv add pyqt5==5.15.11 pyqt5-qt5==5.15.2^1^

在pyproject.toml中增加（跟上面一条其实是一样的，只是写法不同）^2^：

ini 复制代码

[dependency-groups]
dev = [
    "pyqt5==5.15.11",
    "pyqt5-qt5==5.15.2",
]

或^3^

ini 复制代码

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

在pyproject.toml中增加^3^：

ini 复制代码

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

用PyQt6（草）^4^

Windows系统无法直接用uv安装pyqt5，但可以用uv pip安装

1. 问题

2. 原因

3. 解决方案

Footnotes