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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def set_port_info(self, webport, mediaport, httpsport,
                                      onvifport, callback=None):
        '''
        Set http port and media port of camera.
        '''
        params = {'webPort'   : webport,
                  'mediaPort' : mediaport,
                  'httpsPort' : httpsport,
                  'onvifPort' : onvifport,
                 }
        return self.execute_command('setPortInfo', params, callback=callback)