All right, it's time to wrap things up!

• Dictionaries are defined within curly braces:

  phonebook = {'Mary': '8349374', 'Anne': '7439834', 'John': '3472983'}

• Dictionary elements are accessed with keys in square brackets:

  phonebook['Mary']

• To add or update a dictionary element, use the following notation:

  phonebook['Mary'] = '3243563'
  phonebook['Jack'] = '3423457'
  

• To delete a dictionary element, use:

  del phonebook['Mary']

• To iterate over a dictionary, use:

  for key, value in phonebook.items():
    print(key, '=', value)
  

• Dictionaries can be used as function arguments. They can also be returned from functions.

Time for a short quiz!