human
Solve the following python programming problem given the following code:
def render_POST(self, request) : 
    def _render(result, r) : 
        if r.finished : 
            server_log ('Client disconnected') 
            r.channel.connectionLost (None) 
            return 
data = result.get ('response', 'ok') 
        r.setHeader ('content-type', result.get ('type', 'text/plain')) 
        r.setHeader ('Pragma', 'no-cache') 
        r.setHeader ('Cache-Control', 'no-cache') 
        r.setHeader ('content-length', str (len (data))) 
        r.setResponseCode (result.get ('code', 200)) 
        r.write (str (data)) 
        r.finish () 
d = self.execute (d) 
    d.addBoth (self.msgBufResponse) 
    d.addCallback (_render, request) 
    return server.NOT_DONE_YET 

    
    

    Fix the buggy line: d = self.execute (d)
assistant
#Here is Python program to fix the buggy line: d = self.

d = self.execute (request)