16. Merging dictionaries

Avoid explicit iterations when merging two dictionaries.

16.1. Don’t do this

name = {
    'first_name': 'john',
    'last_name': 'doe'
}
address = {
    'street': '123 main street',
    'city': 'washington',
    'state': 'dc',
    'zip': 20500
}

person = {}
for k, v in name.items():
    person[k] = v
for k, v in address.items():
    person[k] = v

16.2. Do this

name = {
    'first_name': 'john',
    'last_name': 'doe'
}
address = {
    'street': '123 main street',
    'city': 'washington',
    'state': 'dc',
    'zip': 20500
}

person = {**name, **address}