Final check procedure
        The captain's name is John
        The pilot's name is Mary
        The mechanic's name is Mike
<traceback object at 0x00D373A0>
<class 'traceback'>

Traceback details
  File "exceptions#090.py", line 22, in <module>
    personnel_check()

  File "exceptions#090.py", line 14, in personnel_check
    raise RocketNotReadyError('Crew is incomplete') from e

Final check is over