An improved pagination widget based on PYQT5

The Model-View framework of PyQt5 has no pagination function to display the data well, this paper separates the pagination work from the whole project, but also use the “signals and slot” to keep the parameters synchronization. So we can design forwards, backwards, records per page and other pagination functions in the widget, and then we can use “promote” function of PYQT5 to apply in our own code with simple modification only. we constructed a more powerful, easily reusable widget base on the class inheritance of Python and richly functional components of PyQt5.