pip3 install PyQt5 --user 失败

Question

尝试通过 pip3 安装 PyQt5 时出现错误。自动消息要我添加更多详细信息，但我没有。所有细节都在代码中。

➜  ~ pip3 install PyQt5 --user 
Collecting PyQt5
  Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x7f2c97cfeb50>: Failed to establish a new connection: [Er
rno -2] Name or service not known')': /simple/pyqt5/
  Using cached https://files.pythonhosted.org/packages/3a/fb/eb51731f2dc7c22d8e1a63ba88fb702727b324c6352183a32f27f73b8116/PyQt5-5.14.1.tar.gz
  Installing build dependencies ... done
  Getting requirements to build wheel ... done
    Preparing wheel metadata ... error
    Complete output from command /usr/bin/python3 /usr/lib/python3.7/site-packages/pip/_vendor/pep517/_in_process.py prepare_metadata_for_build_wheel /tmp/tmp3yjy_ooq:
    Traceback (most recent call last):
      File "/usr/lib/python3.7/site-packages/pip/_vendor/pep517/_in_process.py", line 64, in prepare_metadata_for_build_wheel
        hook = backend.prepare_metadata_for_build_wheel
    AttributeError: module 'sipbuild.api' has no attribute 'prepare_metadata_for_build_wheel'

    During handling of the above exception, another exception occurred:

    Traceback (most recent call last):
      File "/usr/lib/python3.7/site-packages/pip/_vendor/pep517/_in_process.py", line 207, in <module>
        main()
      File "/usr/lib/python3.7/site-packages/pip/_vendor/pep517/_in_process.py", line 197, in main
        json_out['return_val'] = hook(**hook_input['kwargs'])
      File "/usr/lib/python3.7/site-packages/pip/_vendor/pep517/_in_process.py", line 67, in prepare_metadata_for_build_wheel
        config_settings)
      File "/usr/lib/python3.7/site-packages/pip/_vendor/pep517/_in_process.py", line 95, in _get_wheel_metadata_from_wheel
        whl_basename = backend.build_wheel(metadata_directory, config_settings)
      File "/tmp/pip-build-env-1ms8fm3e/overlay/lib64/python3.7/site-packages/sipbuild/api.py", line 51, in build_wheel
        project = AbstractProject.bootstrap('pep517')
      File "/tmp/pip-build-env-1ms8fm3e/overlay/lib64/python3.7/site-packages/sipbuild/abstract_project.py", line 82, in bootstrap
        project.setup(pyproject, tool, tool_description)
      File "/tmp/pip-build-env-1ms8fm3e/overlay/lib64/python3.7/site-packages/sipbuild/project.py", line 387, in setup
        self.apply_user_defaults(tool)
      File "project.py", line 62, in apply_user_defaults
        super().apply_user_defaults(tool)
      File "/tmp/pip-build-env-1ms8fm3e/overlay/lib/python3.7/site-packages/pyqtbuild/project.py", line 86, in apply_user_defaults
        super().apply_user_defaults(tool)
      File "/tmp/pip-build-env-1ms8fm3e/overlay/lib64/python3.7/site-packages/sipbuild/project.py", line 202, in apply_user_defaults
        self.builder.apply_user_defaults(tool)
      File "/tmp/pip-build-env-1ms8fm3e/overlay/lib/python3.7/site-packages/pyqtbuild/builder.py", line 68, in apply_user_defaults
        "specify a working qmake or add it to PATH")
    sipbuild.pyproject.PyProjectOptionException

    ----------------------------------------
Command "/usr/bin/python3 /usr/lib/python3.7/site-packages/pip/_vendor/pep517/_in_process.py prepare_metadata_for_build_wheel /tmp/tmp3yjy_ooq" failed with error code 1 in /tmp/pip-install-6w4gkbyk/PyQt5

尝试直接安装 Qt，以便在路径中获取 QMake，但无济于事。

➜  ~ qmake --version
QMake version 2.01a
Using Qt version 4.8.7 in /usr/lib64
➜  ~

OS 信息 (Fedora 30)

 5.2.11-200.fc30.x86_64 #1 SMP Thu Aug 29 12:43:20 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

更多版本

➜  ~ pip3 --version
pip 19.0.3 from /usr/lib/python3.7/site-packages/pip (python 3.7)
➜  ~ python3 --version
Python 3.7.5
➜  ~

Answer 1

无论是在 MacOS 还是 on Linux you can use homebrew to install PyQt5:

brew install pyqt5

Answer 2

我在安装tensorflow时遇到了同样的错误。升级 "setuptools" 和 "pip" 到 最新的次要版本 对我有用。

pip3 install PyQt5 --user 失败

pip3 install PyQt5 --user fails

python

pip

pyqt

python-sip

pyqt5