无法使用 pip 安装 PyQt5

Question

我尝试使用安装 PyQt5

pip install PyQt5

和

sudo -H pip install PyQt5

他们都给了我错误

ERROR: Could not find a version that satisfies the requirement PyQt5 (from versions: none)
ERROR: No matching distribution found for PyQt5

我使用 Ubuntu 18.04。

我的python版本是：Python 2.7.15rc1

---

我已经安装了 python3-pip 并尝试使用安装 PyQt5

pip3 install PyQt5

我收到错误

Traceback (most recent call last):
  File "/usr/local/bin/pip3", line 5, in <module>
    from pkg_resources import load_entry_point
  File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 3241, in <module>
    @_call_aside
  File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 3225, in _call_aside
    f(*args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 3254, in _initialize_master_working_set
    working_set = WorkingSet._build_master()
  File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 585, in _build_master
    return cls._build_from_requirements(__requires__)
  File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 598, in _build_from_requirements
    dists = ws.resolve(reqs, Environment())
  File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 786, in resolve
    raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'pip==9.0.1' distribution was not found and is required by the application

我的python3版本是：Python3.6.7。

Answer 1

尝试这个：

python3 -m pip install PyQt5

Answer 2

你需要升级你的 pip

pip install --user --upgrade pip

然后进行全新安装

pip install PyQt5

或者

pip3 install PyQt5

Answer 3

我知道现在回答有点晚了。 在 PyCharm 中，即使升级的 pip 也会在此包中出错。 将 PyQt5 版本降级到 5.12.2 工作正常。 用，

pip install PyQt5==5.12.2 
pip install PyQtWebEngine==5.12

或者，

pip3 install PyQt5==5.12.2
pip3 install PyQtWebEngine==5.12

对我来说很好用。

Answer 4

你可以运行命令

   pip3 install PyQt5

或者对于 Python 2，您可以从https://www.riverbankcomputing.com/software/pyqt/download5手动安装