Example of connecting a PyQt signal to a method with a decorator

pyqt_signal_slot_wrapper.py

# -*- coding: utf-8 -*-

from PySide import QtCore, QtGui

def wrapper(fn):
    print('inside wrapper...')
    def wrapped(*args, **kwargs):
        print('inside wrapped!')
        fn(*args, **kwargs)
    return wrapped

class MyDialog(QtGui.QDialog):
    def __init__(self):
        super(MyDialog, self).__init__()
        
        # add a button to the dialog
        self.button = QtGui.QPushButton('Push Me!')
        self.layout = QtGui.QVBoxLayout()
        self.layout.addWidget(self.button)
        self.setLayout(self.layout)
        
        # when the button is clicked, hello is called
        self.button.clicked.connect(self.hello)

    @wrapper
    def hello(self):
        print('hello')

if __name__ == '__main__':
    app = QtGui.QApplication([])
    dialog = MyDialog()
    dialog.show()
    app.exec_()