human
Solve the following python programming problem given the following code:
def waiting_dialog(f, w = None) : 
    s = Timer () 
    s.start () 
    if (not w) : 
        w = QDialog () 
        w.resize (200, 70) 
        w.setWindowTitle ('Electrum') 
else : 
        if w.layout () : 
            QWidget ().setLayout (w.layout ()) 
l = QLabel ('') 
    vbox = QVBoxLayout (w) 
    vbox.addWidget (l) 
    w.show () 
    def ff() : 
        s = f () 
        if s : 
            l.setText (s) 
else : 
            w.accept () 
w.connect (s, SIGNAL ('timersignal'), s) 
    w.exec_ () 

    
    

    Fix the buggy line: w.connect (s, SIGNAL ('timersignal'), s)
assistant
#Here is Python program to fix the buggy line: w.

w.connect (s, SIGNAL ('timersignal'), def ff()