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One, install Python3

The python version supported by PyQt5 starts from 3.5, so the installed Python3 version must be greater than 3.5.
The location of my installation is C:\Python\Python38.
seeThe installation of Pyhton

Second, install PyQt5 and PyQt5-tools (there is a designer in it)

pip install PyQt5
pip install PyQt5-tools

Three, VSCode configure Python

SeeVSCode configuration Python official tutorial

1. VSCode installs Python expansion package

2. Start VS Code in the project (workspace) folder

1. Create a folder corresponding to the Python language in the vscode workspace folder
   Create a new vscode->New VS-Code-Python in D drive

   Explanation: There may be codes in multiple languages ​​under the vscode folder in the future, so it is recommended to generate the corresponding language subfolders. For example, if you plan to write C, create a new VS-Code-C folder, and if you plan to write Python, create a new VS-Code -Python

2. Create a new .vscode folder under the VS-Code-Python folder

   Explanation: Because VS needs to configure each folder separately, it is recommended to put the .vscode folder on the top level of your frequently used folders, so that there is no need to repeat the configuration. There is no need for a set of configurations for each new py file. These configurations can be used in all subfolders and files in your configured folder

3. Open vscode, select File->Open Folder, open the VS-Code-Python folder

3. Choose a Python interpreter

Shortcut key ctrl+shift+p, enter python:, select the option shown in the figure below, select the Python interpreter (flip back if you don’t see it), and then an optional interpreter will appear. Selecting an interpreter will set the value in the python.pythonPath workspace setting to the path of the interpreter.

5. Configure and run the debugger

1) Create a new test.py file test in the VS-Code-Python directory and run the code.

msg  = "Hello World!";
print(msg);

2) Press F5 to debug test.py.
Since this is the first time to debug this file, a configuration menu will be opened from the "Command Panel", and now select Python File, which is to run the editor with the currently selected Python interpreter The configuration of the current file displayed in.

Fourth, VSCode configures PyQt5 and designer

SeePython interface programming: VScode+pyqt+pyqt integration configuration notes
seePyQt5 (designer) introductory tutorial

1. Install pyqt integration extension

2. Configure pyqt integration and draw a simple UI interface test

1) Select File -> Preferences -> Settings, search for pyqt, and set the path of pyuic5 and the path of QT designer. (My pyuic5 is not changed by default, designer is empty, so configure the designer path)
These two files are in the python installation path, search pyuic5 and designer to find the location.
My pyuic5 path is C:\Python\Python38\Scripts\pyuic5
My designer path is C:\Python\Python38\Lib\site-packages\pyqt5_tools\Qt\bin\designer

2) Right-click on the area under VS-Code-Python in the resource manager and select PYQT: New Form, the qt designer interface editor will open.

3) This "New Form" window will pop up at the first startup, select "Main Window" and click "Create". Drag several controls on the canvas.

4) Use the shortcut key Ctrl+R to preview the currently written GUI (or enter from Form> Preview / Preview in in the menu bar)

5) After drawing the interface and saving it, the corresponding .ui file will be generated.
6) Right-click the .ui file and select PYQT:compile from.
can compile the untitled.ui file and automatically generate the corresponding py file Ui_untitled.py

7) Trying to run the "Ui_untitled.py" just generated is useless, because the generated file does not have a program entry. Therefore, we create another program called "main.py" in the same directory, and enter the following content, replacing Ui_untitled with the name of the .py file you generated.

import sys
from PyQt5.QtWidgets import QApplication, QMainWindow

import Ui_untitled

if __name__ == '__main__':
    app = QApplication(sys.argv)
    MainWindow = QMainWindow()
    ui = Ui_untitled.Ui_MainWindow()
    ui.setupUi(MainWindow)
    MainWindow.show()
    sys.exit(app.exec_())