person = {
    "first_name": "Bob",
    "last_name": "Smith"
}

# for key in person:
#     print(key)

# for key in person.keys():
#     print(key)

# for value in person.values():
#     print(value)

# for key, value in person.items():
#     print(key, value)

the_keys = person.keys()

person["age"] = 23

print(the_keys)
