Install pyqt5 and Matplotlib module

Preface

Previous blogs talked about how to install Python, Today's essay is based on the book , Share about PyQT5 Installation of and related modules , In order to facilitate each family to study PyQT5, It is convenient to write automated testing tools or understand this tool , So share this process ！

Welcome to one button and three links , Pay attention, like to walk a wave (づ￣ 3￣)づ

One 、 install PyQt5

install pyQT5 There are two ways
1. download PyQT5 Compile and install the latest source code of ( More trouble )
2. Use pip install Online installation （ The following describes this method ）

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pip install PyQT5 -i https://pypi.douban.com/simple

（ add -i https://pypi.douban.com/simple It means using the image service provided by Douban .）

Be careful ：
1. because Python The image used for installing the module is foreign by default , Due to network problems , Download foreign Python Modules often fail to download , So you need to use the domestic image download Python modular .
2. If prompted, I don't know install situation , Access to Scripts Directory . Such as D:\Users\xxx\AppData\Local\Programs\Python\Python39\Scripts
Then use the above installation instructions

pyQt5.9 No longer provide commonly used QT Tools , For example, graphical interface development tools QT Designer、 International translation tools Liguist, Therefore, you also need to use the following commands to install commonly used QT Tools

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

Be careful ：
1. Because the blogger seems to have failed to install due to network problems in this step , Therefore, it has been updated in the process pip, Then install PyQt5-tools, Such as ：python -m pip install --upgrade pip

Two 、 To configure PyQT5 Environment variables of

In order to make Windows The system can correctly identify PyQt5-tools Common commands , You need to put PyQt5-tools The installation directory of is added to the system environment variable Path in . Right click on the desktop “ My computer ”, Pop up the shortcut menu , choice “ attribute ”—>“ Advanced system setup ”——>“ senior ”, single click “ environment variable ” Button , In system variable Path Add the following variable values to ,
Such as ：D:\Users\xxx\AppData\Local\Programs\Python\Python39\Lib\site-packages\pyqt5_tools

notes ： This path is for bloggers to install PyQt5-tools The location of , Please revise it according to the actual situation

* Check whether the configuration is successful & test PyQt5 Environment installed successfully

1. Check whether the configuration is successful ： Use Win+R Shortcut key , Enter... In the query box cmd, Enter into Windows Command window for , Input Path command , If everything goes well , Will be returned in Path See in path PyQT5-tools Installation path for , As shown in the figure below ：

2. test PyQt5 Environment installed successfully ： The file named testPyQt.py,py by Python Extension . The complete code is as follows ：

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_())

 stay windows In the system , double-click testPyQT.py file , If no error is reported , The following image interface pops up , shows PyQt5 Environment installed successfully 

3、 ... and 、 install matplotlib modular

Enter the following command :

pip3 install matplotlib -i https://pypi.douban.com/simple

（ add -i https://pypi.douban.com/simple It means using the image service provided by Douban , Use pip There is no problem with the old version ）

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Reference books ：PyQt 5 Rapid development and actual combat