human
Solve the following python programming problem given the following code:
@ Process.install ('pong') 
def pong(self, from_pid, body) : 
    log.info ('Received pong') 
    def respond() : 
        time.sleep (0.5) 
        self.send (from_pid, 'ping') 
self.context.loop.add_callback (body) 

    
    

    Fix the buggy line: self.context.loop.add_callback (body)
assistant
#Here is Python code to fix the buggy line: self.

self.context.loop.add_callback (def respond()