PyQt can be used to create a graphical user interface, GUI. Qt was created by Riverbank Computing.
Graphical interfaces made with PyQt can run on all major desktop systems including Microsoft Windows, Apple Mac and Unix.
The HelloWindow class inherits from the class QMainWindow. We call its super method to initialize the window. Several class variables are set: size and window title. We add widgets to the window, including a label widget (QLabel) which displays the message “Hello World”.
Pyqt supports tool tips, they can be configured for widgets.
A tooltip is a hint in a graphical interface. Tooltips frequently appear when hovering the mouse over a widget (without clicking). Tooltips are not shown on mobile devices because there’s no mouse cursor.