解决方案尝试 先安装​​pyqt5​​依赖项：

1、更新python3.7

sudo add-apt-repository ppa:deadsnakes/ppa sudo apt-get update sudo apt-get upgrade sudo apt-get autoremove sudo apt-get install python3.7 sudo update-alternatives –install /usr/bin/python3 python3 /usr/bin/python3.7 2 sudo update-alternatives –config python3 sudo apt-get install python3.7-dev sudo apt-get install libhdf5-dev  

2、更新pip3：

sudo python3 -m pip install –upgrade pip

3、安装pyqt5的依赖项

sudo apt install pyqt5*

sudo apt install qt5-default qttools5-dev-tools

4、最后再安装pyqt5

sudo pip3 install pyqt5 sudo pip3 install pyqt5-tools

来源：asura77777