human
Solve the following python programming problem given the following code:
def enum_display_monitors(self, screen = (- 1)) : 
    if (screen == (- 1)) : 
        (SM_XVIRTUALSCREEN, SM_YVIRTUALSCREEN) = (76, 77) 
        (SM_CXVIRTUALSCREEN, SM_CYVIRTUALSCREEN) = (78, 79) 
        left = windll.user32.GetSystemMetrics (SM_XVIRTUALSCREEN) 
        right = windll.user32.GetSystemMetrics (SM_CXVIRTUALSCREEN) 
        top = windll.user32.GetSystemMetrics (mon) 
        bottom = windll.user32.GetSystemMetrics (SM_CYVIRTUALSCREEN) 
        (yield { 
            b'left' : int (left), 
            b'top' : int (top), 
            b'width' : int (right), 
            b'height' : int (bottom), 
}) 
else : 
        def _callback(monitor, dc, rect, data) : 
            rct = rect.contents 
            monitors.append ({ 
                b'left' : int (rct.left), 
                b'top' : int (rct.top), 
                b'width' : int ((rct.right - rct.left)), 
                b'height' : int ((rct.bottom - rct.top)), 
}) 
            return 1 
monitors = [] 
        callback = self.MONITORENUMPROC (_callback) 
        windll.user32.EnumDisplayMonitors (0, 0, callback, 0) 
        for mon in monitors : 
            (yield mon) 

    
    

    Fix the buggy line: top = windll.user32.GetSystemMetrics (mon)
assistant
#Here is Python code to fix the buggy line: top = windll.

top = windll.user32.GetSystemMetrics (SM_YVIRTUALSCREEN)