gidgid

import pytest
from typing import Optional
from pydantic import PositiveInt, ValidationError


def get_payload(url: str, retries: PositiveInt) -> Optional[dict]:  # 1
    if url.startswith("http"):
        # send the actual request and return the payload if valid response
        return {}
    return None

gidgid

import pytest
from typing import Optional
from pydantic import validate_arguments, PositiveInt, ValidationError


@validate_arguments  # 1
def validated_get_payload(url: str, retries: PositiveInt) -> Optional[dict]:
    if url.startswith("http"):
        # send the actual request and return the payload if valid response
        return {}

gidgid

from typing import Optional
from pydantic import validate_arguments, HttpUrl, PositiveInt

@validate_arguments
def better_get_payload(
        url: HttpUrl,  # 1
        retries: PositiveInt
) -> Optional[dict]:
    # send the actual request - no need to verify URL  # 2
    return {}

gidgid

from pydantic import BaseModel


class Item(BaseModel):
    id: str  # 1
    isAvailable: bool  # 2


def test_does_it_look_pythonic_to_you():
    item = Item(id='test-item-id', isAvailable=True)  # 3

gidgid

from pydantic import BaseModel


class Item(BaseModel):
    _id: str  # 1
    is_available: bool


def test_pydantic_hides_names_with_preceding_underscores():
    item = Item(_id='test-item-id', is_available=True)  # 1

gidgid

import pytest
from pydantic import BaseModel, Field, ValidationError


class Item(BaseModel):
    item_id: str
    is_available: bool = Field(alias='isAvailable')  # 1


def test_field_aliasing_bridges_inconsistant_conventions():

gidgid

from pydantic import BaseModel


class Pizza(BaseModel):
    toppings_count: int
    size: str


def test_copy_with_update_doesnt_perform_conversion():
    pizza = Pizza(toppings_count='4', size='XL')  # 1

gidgid

from pydantic import BaseModel


class Pizza(BaseModel):
    toppings_count: int
    size: str


def test_set_field_doesnt_perform_coercion():
    pizza = Pizza(toppings_count='4', size='XL')  # 1

gidgid

import pytest
from pydantic import BaseModel, ValidationError


class Pizza(BaseModel):
    toppings_count: int
    size: str

    class Config:  # 1
        validate_assignment = True  # 2

gidgid

import pytest
from pydantic import BaseModel, conlist, constr, ValidationError


class User(BaseModel):
    name: constr(min_length=1)  # 1
    scores: conlist(int, min_items=1)  # 2


def report(user: User):