# 1. Install PyQt5

The official website of PyQt5 is https://www.riverbankcomputing.com. The latest version as of now is v6.7.4. It is recommended to use pip to install, or you can go to the above official website link to download and install.

pip install PyQt5

# 2. Install PyQt5-tools

Since PyQt5 no longer provides common Qt tools, such as the graphical interface development tool Qt Designer and the international translation tool Liguist, you must install the Qt tools yourself.

pip install PyQt5-tools

# 3. Add environment variables

· Right-click "My Computer" on the desktop, select "Properties" -> "Advanced System Settings" -> "Advanced" in the pop-up shortcut menu, click the environment variable button, and set the path in the system variable Path Add the absolute path of the pyqt5-tools directory in .

· Enter the Path command on the Windows command line. If everything is normal, you will see the path just configured in the returned Path path.

# 4. Test

import sys
from PyQt5.QtWidgets import QWidget, QApplication
app = QApplication(sys. argv)
widget = QWidget()
widget. resize(640, 480)
widget.setWindowTitle("Hello, PyQt5!")
widget. show()
sys. exit(app. exec())

If no error is reported and a window titled "Hello, PyQt5!" pops up, the installation is successful.