Consider a Python Dictiionary which represents a ship's crew. jack has been promoted as captain and new member Tom has joined as a Co captain

 ''' Consider a Python Dictiionary which represents a ship's crew .'''

ship_crew={"Co-Captain":"Jack","Chief officer":"Mack","Chief Steward":"Harry","Chief cook":"Mala"}

print(ship_crew)

# ship_crew['Co-Captain']="Tom"

# ship_crew['Captain']="jack"

ship_crew['Captain']=ship_crew['Co-Captain']

ship_crew['Co-Captain']="Tom"

print(ship_crew)

'''

OUTPUT

{'Co-Captain': 'Jack', 'Chief officer': 'Mack', 'Chief Steward': 'Harry', 'Chief cook': 'Mala'}

{'Co-Captain': 'Tom', 'Chief officer': 'Mack', 'Chief Steward': 'Harry', 'Chief cook': 'Mala', 'Captain': 'Jack'}

'''