def json_format():
# Read a human from a JSON string.
human = Human.from_json("")
Human.from_json_stream()
human.continent = ContinentName.AFRICA
# Serialize a human to a JSON string.
json = human.to_json()
def messages():
human = Human(id=1, name="John")
human.location = Location(lat=30, lng=40)
human.birthday = datetime.datetime(1987, 8, 7)
