fastapi_tutos/pydanamic.py

from datetime import datetime
from pydantic import BaseModel
from typing import Annotated

class User(BaseModel):
    id:int
    name:str="John Doe"
    signup_ts:datetime | None = None
    friends: list[int]=[]
    
external_data={
    "id":"123",
    "signup_ts":"2017-06-01 12:22",
    "friends":[1,"2",b"3"],
}
user=User(**external_data)
print (user)
print("\n"*2)
print(user.id)

def say_hello(name:Annotated[str,"This is just metadata"])->str:
    return f'Hello {name}'

print(say_hello("tongue"))