1、在线下载安装

pip3 install PyQ5

 

2、离线包安装--首先先下载安装包

PyQt5-5.8.2-5.8.0-cp35.cp36.cp37-none-win_amd64.whl

pip3 install C:\Users\guoxunqiang\Desktop\pyqtsee5\PyQt5-5.8.2-5.8.0-cp35.cp36.cp37-none-win_amd64.whl

3、安装PyQT5--tools

pip3 install PyQT5-tools或离线包安装https://pypi.org/project/pyqt5tools/#files