Merge two dictionaries.

dict_03_merge.py

def merge_dictionaries(left: dict, right: dict) -> dict:
    """Merge two dictionaries using a shallow copy."""
    temp: dict = left.copy()
    temp.update(right)
    return temp


countries: dict = {
    "Taiwan": 36193,
    "Canada": 9984670,
    "United States": 9525067,
    "Russia": 17098246,
    "Argentina": 2780400,
    "Zambia": 752612,
    "China": 9596961,
}

cities: dict = {
    "Toronto": ["Canada", 6082000],
    "New York City": ["United States", 18819000],
    "Moscow": ["Russia", 12410000],
    "Buenos Aires": ["Argentina", 14967000],
    "Shanghai": ["China", 25582000],
    "Lusaka": ["Zambia", 1747152],
    "Taipei": ["Taiwan", 2646204],
}

assert merge_dictionaries(countries, cities) == {
    "Taiwan": 36193,
    "Canada": 9984670,
    "United States": 9525067,
    "Russia": 17098246,
    "Argentina": 2780400,
    "Zambia": 752612,
    "China": 9596961,
    "Toronto": ["Canada", 6082000],
    "New York City": ["United States", 18819000],
    "Moscow": ["Russia", 12410000],
    "Buenos Aires": ["Argentina", 14967000],
    "Shanghai": ["China", 25582000],
    "Lusaka": ["Zambia", 1747152],
    "Taipei": ["Taiwan", 2646204],
}