Raspberry Pi OS., Python Qt5 Setup:
install python and qt5 tools
sudo apt-get dist-upgrade
sudo apt-get install qt5-default
sudo apt-get install qtcreator
sudo apt-get install libqt5serialport5
sudo apt-get install qttools5-dev-tools
sudo apt-get install eric
reboot pi
../
start the Eric Python IDE
Python GUI Example Part#1 – Install Python IDE & Tools on Raspberry Pi
https://www.youtube.com/watch?v=s81_WnM1oJA
Python GUI Example Part#1 – Install Python IDE & Tools on Raspberry Pi
https://www.youtube.com/watch?v=s81_WnM1oJA
Python GUI Example Part#2 – Create a new Project
https://www.youtube.com/watch?v=VvGfU5zJHiQ&t=272s
simple GUI application with Eric IDE
https://www.youtube.com/watch?v=VvGfU5zJHiQ
Python GUI Example Part#3 – Control NeoPixel Digital RGB LED with sliders
https://www.youtube.com/watch?v=Ug0ZfgqA9So
Python GUI Example Part#4 – Advanced Python Graphical Application PyQt5
https://www.youtube.com/watch?v=rG0vzTk5xPQ&t=208s
1.
double click on the mainWindow.ui file
https://www.youtube.com/watch?v=rG0vzTk5xPQ
Python GUI Example Part#1 – Install Python IDE & Tools on Raspberry Pi
Qt Designer Manua
https://doc.qt.io/qt-5/qtdesigner-manual.html