<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _a_pitch_kd_callback(self, name, value):
 """Callback for pid_attitude.pitch_kd"""

        print('Readback: {0}={1}'.format(name, value))

        # End the example by closing the link (will cause the app to quit)
        self._cf.close_link()