human
Solve the following python programming problem given the following code:
def close(self) : 
    d = self._pool.closeCachedConnections () 
    delayed_call = reactor.callLater (d._disconnect_timeout, d.callback, []) 
    def cancel_delayed_call(result) : 
        if delayed_call.active () : 
            delayed_call.cancel () 
return result 
d.addBoth (cancel_delayed_call) 
    return d 

    
    

    Fix the buggy line: delayed_call = reactor.callLater (d._disconnect_timeout, d.callback, [])
assistant
#Here is Python code to fix the buggy line: delayed_call = reactor.

delayed_call = reactor.callLater (self._disconnect_timeout, d.callback, [])