new_contents: def packer(**kwargs):
  	print(kwargs)
  
  def unpacker(first_name=None,last_name=None):
  
  	if first_name and last_name:
  		print(first_name,last_name)
  	else:
  		print('Anon.')
  
  
  packer(name='John Kennedy',age=23,agent_code=None)
  unpacker(**{'first_name': 'John', 'last_name': 23})
  
subject: Create packer_unpacker.py