![]() In the following example, two QPushButton objects (b1 and b2) are added in QDialog window. (button, QtCore.SIGNAL(“clicked()”), slot_function) ![]() It can be achieved in any of the following two techniques − Here, the clicked signal is to be connected to a callable function. Suppose if a function is to be called when a button is clicked. ![]() (widget, QtCore.SIGNAL(‘signalname’), slot_function)Ī more convenient way to call a slot_function, when a signal is emitted by a widget is as follows − ![]() Following are most commonly used techniques − In PyQt, connection between a signal and a slot can be achieved in different ways. The slot can be any callable Python function. The signal on its own does not perform any action. Each PyQt widget, which is derived from QObject class, is designed to emit ‘ signal’ in response to one or more events. Widgets used to build the GUI interface act as the source of such events. Functions or methods are executed in response to user’s actions like clicking on a button, selecting an item from a collection or a mouse click etc., called events. Unlike a console mode application, which is executed in a sequential manner, a GUI based application is event driven.
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