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PyQt5 is a powerful Python library for creating graphical user interface (GUI) applications. It is a Python binding based on the Qt framework that allows developers to easily create rich and interactive applications using the Python language.
This article will take you to the introductory stage of the Python graphical user interface application PyQt5-GUI
Table of contents
(6) Double-click to open designer.exe
2. Anaconda3 direct installation
(1) Find the Anaconda3 path and enter envs
(2) Enter the virtual environment you created
(7) Double-click to open designer.exe
1. Understand the three major blocks of the user interface
1. Looking back on the past
In the last chapter "[PyQt5] Building a Powerful Python Graphical User Interface Application--Getting Started Guide" , I have already talked about the introduction, development history, advantages and disadvantages, basic steps and basic use of PyQt5. I believe that everyone has a good understanding of PyQt5 If you have a certain understanding, then this chapter will tell you how to use PyQt5-GUI to perform some simple operations. Just follow my steps step by step to ensure that you have a deeper understanding of PyQt5. Then, let's practice together!
2. Installer
It is very convenient to install PyQt5-GUI now. It only takes two lines of code to complete the installation. I have to say, Python YYDS~
pip install pyqt5
pip install pyqt5-toolsIt is recommended that you still use the Anaconda3 virtual environment to operate to prevent dependency library conflicts.
If the network is slow during installation, use the mirror source to download, and the speed will be many times faster.
It is recommended to use the mirror source of Tsinghua University https://pypi.tuna.tsinghua.edu.cn/simple/
Below is a screenshot after installation
Is the installation procedure very simple? It only takes a few minutes~
Next, let's start to open the program!
3. Open the program
1. Python direct loading
(1) Find the Python path
(2) Enter Lib
(3) Enter site-packages
(4) Enter qt5_applications
(5) Enter Qt/bin
(6) Double-click to open designer.exe
Well, the above is the way to open the PyQt5-GUI directly installed in Python.
2. Anaconda3 direct installation
(1) Find the Anaconda3 path and enter envs
(2) Enter the virtual environment you created
(3) Enter Lib
(4) Enter site-packages
(5) Enter qt5_applications
(6) Enter Qt/bin
(7) Double-click to open designer.exe
Well, the above is how to open the Anaconda3 virtual environment to install PyQt5-GUI.
4. Simple operation
1. Understand the three major blocks of the user interface
Widget Box is a variety of small functional modules we need to use.
The object viewer is that we can directly call the name of a small module in the code for further operations.
The property editor is where you can customize various parameters you need.
2. Create an empty window
Click on the file in the upper left corner
select new
Select Main Window
click create
Then
Click on the file in the upper left corner
Click Save (Ctrl + s)
Choose your own folder or create a new folder
It is recommended not to save to the system disk, if there is only one disk, I did not say
That's it!
Remember to save every time you add a function or modify it
You can use the shortcut key Ctrl + r to browse
3. Change the window name
Find the property editor
Find the Qwidget
Find windowTitle and double-click its value to modify it
Remember to press Enter to save after modification
Then you can browse with Ctrl + r to view the modified window
4. Write a hello world
Find Display Widgets under the Widget Box
Find Label under Display Widgets
Click and hold the Label with the left mouse button to drag
Drag it under the window we created
Then edit hello world
Ctrl + r to browse
Remember Ctrl + s to save
Just such a small interface is created,
How about it, isn't it very simple?
Next, generate the python source code!
5. Convert to py source code
If you have reached this point, it means that you have designed an interface,
But now there are only ui files, no py source code yet,
So, how to generate it?
Come and do it with me~
1. Click the file path above
2. Enter cmd and press Enter
open terminal
path is the path folder of the ui
3. Start conversion
First enter the virtual environment (conda activate name) using the Anaconda3 virtual environment
Then enter the command
pyuic5 -o name.py name.ui
can be seen
py file source code already exists
Don't you think it's done here?
No no no, one more step
come on, keep going
4. Run the source code
First, in the same directory
Create a main.py file
write source code in file
Then just run
# -*- coding: utf-8 -*-
import sys
from PyQt5.QtWidgets import QApplication,QMainWindow
import pyqt5_gui
if __name__ == '__main__':
app = QApplication(sys.argv)
MainWindow = QMainWindow()
ui = pyqt5_gui.Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())
At this point, the entire PyQt5-GUI process is over.
How about it, isn't it simple?
You are awesome, I give you a thumbs up~ good~
6. Example source code
three buttons
a text box
interconnected
# -*- coding: utf-8 -*-
import sys
from functools import partial
from PyQt5.QtWidgets import QApplication,QMainWindow
import pyqt5_gui
def button_1(ui):
print("按钮1")
ui.textBrowser.append("按钮1")
def button_2(ui):
print("按钮2")
ui.textBrowser.append("按钮2")
def button_3(ui):
print("按钮3")
ui.textBrowser.append("按钮3")
if __name__ == '__main__':
app = QApplication(sys.argv)
MainWindow = QMainWindow()
ui = pyqt5_gui.Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
ui.pushButton.clicked.connect(partial(button_1, ui))
ui.pushButton_2.clicked.connect(partial(button_2, ui))
ui.pushButton_3.clicked.connect(partial(button_3, ui))
sys.exit(app.exec_())
7. Summary
In this chapter, I explained in detail the installation program of PyQt5-GUI, how to open it, simple operation, how to convert it to source code and simple sample source code. I personally feel that although PyQt5 is not difficult to get started, it will be more complicated when it has more functions, so Be sure to remember the location and function of each module to prevent confusion. Hope this article can help you get started with PyQt5-GUI.
In short, PyQt5 is a powerful and flexible library. PyQt5-GUI is convenient and fast, and I feel very easy to use. Come and explore more functions of PyQt5 together!
