Installation package
pip install pyqt5 -i https://pypi.tuna.tsinghua.edu.cn/simple/ --default-timeout=100
pip install pyqt5-tools -i https://pypi.tuna.tsinghua.edu.cn/simple/ --default-timeout=100
QT inspection installation
from PyQt5 import QtWidgets, QtGui
import sys
app = QtWidgets.QApplication(sys.argv)
window = QtWidgets.QWidget();
window.show()
sys.exit(app.exec_())
A pop-up interface window indicates that the installation is successful.
Reference materials: https://www.cnblogs.com/bu123/p/9895105.html