human
Solve the following python programming problem given the following code:
def place_sign(self, pos, lines = [], **place_block_kwargs) : 
    '
        Place a sign block and write on it.
        ' 
    if (self.inventory.active_slot.item_id != 323) : 
        raise ValueError (('Must hold sign to place, not "%s"' % self.inventory.active_slot.item)) 
def write_sign_text(event, packet) : 
        data = { 
            'location' : packet.data ['location'], 
} 
        for i in range (4) : 
            data [('line_%i' % (i + 1))] = (lines [i] if (i < len (lines)) else '') 
self.net.push_packet ('PLAY>Update Sign', data) 
        return EVENT_UNREGISTER 
self.event.reg_event_handler ('PLAY<Sign Editor Open', self) 
    self.place_block (pos, ** place_block_kwargs) 

    
    

    Fix the buggy line: self.event.reg_event_handler ('PLAY<Sign Editor Open', self)
assistant
#Here is Python program to fix the buggy line: self.

self.event.reg_event_handler ('PLAY<Sign Editor Open', def write_sign_text()