import pickle
from datetime import datetime
from pydantic import BaseModel, ValidationError

class User(BaseModel):
    id: int
    name = 'John Doe'
    signup_ts: datetime = None

m = User.parse_obj({'id': 123, 'name': 'James'})
print(m)

try:
    User.parse_obj(['not', 'a', 'dict'])
except ValidationError as e:
    print(e)

# assumes json as no content type passed
m = User.parse_raw('{"id": 123, "name": "James"}')
print(m)

pickle_data = pickle.dumps({
    'id': 123,
    'name': 'James',
    'signup_ts': datetime(2017, 7, 14)
})
m = User.parse_raw(pickle_data, content_type='application/pickle',
                   allow_pickle=True)
print(m)