Install PyQt5 environment under windows

It can be downloaded from the official website of PyQt5 , but it is more convenient to install online with pip install

Win+R, enter cmd to enter DOS, and add "-i https://pypi.douban.com/simple" after it to use the image provided by Douban:

pip install PyQt5 -i https://pypi.douban.com/simple

Then enter the command to download the graphical interface development tool qt designer, the translation tool liguist and other tools:

pip install PyQt5-tools -i https://pypi.douban.com/simple

After installation, we set the environment variables of pyqt5-tools, mine is:

D:\python\Lib\site-packages\pyqt5-tools

It should be very simple to configure system environment variables. You should also configure it when you learn java.

Then open python IDLE to edit the code:

import sys
from PyQt5 import QtWidgets, QtCore

app = QtWidgets.QApplication(sys.argv)
widget = QtWidgets.QWidget()
widget.resize(360, 360)
widget.setWindowTitle("hello, pyqt5")
widget.show()
sys.exit(app.exec())

Click F5 to run, if the following interface appears, the PyQt5 environment has been successfully installed:

Enter import PyQt5 in IDLE, if there is no error, it means that PyQt5 is installed successfully

Finally, we edit the following code in python IDLE to form an API document on the E disk:

import sys
from PyQt5.QtWidgets import QWidget

out = sys.stdout
sys.stdout = open(r'E:\QWidget.txt', 'w')
help( QWidget )
sys.stdout.close()
sys.stdout = out

PyQt5 Reference 

PyQt5 Tutorial