How to use the rs4.asynchat.async_chat.close function in rs4

def close (self):
		# sometimes socket is not closed at once
		# possibly related with SSL socket
		# then prevent doble callbacking in request_handler
				
		if self.socket:
			# self.socket is still None, when DNS not found
			asynchat.async_chat.close (self)
			self._fileno = None
			
		# re-init asychat
		self.ac_in_buffer = b''
		self.incoming = []
		self.producer_fifo.clear()
		self._proto = None
		self._closed = True		
			
		if not self.handler:
			# return to the pool
			return self.set_active (False)
		
		if not self.errcode:
			# disconnect intentionally
			return

def close (self, deactive = 1):
		asynchat.async_chat.close (self)
		# re-init asychat
		self.ac_in_buffer = b''
		self.incoming = []
		self.producer_fifo.clear()

		dbconnect.AsynDBConnect.close (self, deactive)
		self.logger ("[info] ..dbo %s:%d has been closed" % self.address)