The safest `get()` method

object safe get.py

bugs = {
    "FirstName": "Bugs",
    "LastName": "Bunny",
    "Hometown": {
        "City": "Los Angeles",
        "State": "California",
        "Country": {
            "ISO": "US",
            "Text": "United States",
        },
    },
}
elmer = {
    "FirstName": "Elmer",
    "LastName": "Fudd",
}
daffy = {
    "FirstName": "Daffy",
    "LastName": "Duck",
    "Hometown": None,
}

character_list = [bugs, elmer, daffy]

for character in character_list:
    print( "LastName: " + character.get("LastName", "") )

# LastName: Bunny
# LastName: Fudd
# LastName: Duck

for character in character_list:
    hometown = character.get("Hometown") or {}
    country = hometown.get("Country") or {}
    country_iso = country.get("ISO") or ""
    print( "Hometown -> Country -> ISO: " + country_iso )

# Hometown -> Country -> ISO: US
# Hometown -> Country -> ISO: 
# Hometown -> Country -> ISO: 

for character in character_list:
    country_iso = character.get("Hometown", {}).get("Country", {}).get("ISO", "")
    print( "Hometown -> Country -> ISO: " + country_iso )

# Hometown -> Country -> ISO: US
# Hometown -> Country -> ISO: 
# Traceback (most recent call last):
#   File "<stdin>", line 2, in <module>
# AttributeError: 'NoneType' object has no attribute 'get'