Pydantic strict types prevent type coercion

pydantic_strict_types_example.py

import pytest
from pydantic import BaseModel, ValidationError, StrictInt, StrictBool


class UserResponse(BaseModel):
    user_input: StrictBool  # 1


def test_only_bool_responses_are_accepted():
    assert UserResponse(user_input=True).user_input is True  # 2
    assert UserResponse(user_input=False).user_input is False  # 2


@pytest.mark.parametrize(
    'user_input',
    ['yes', 'no', 'true', 'false', 'True', 'False']
)
def test_non_bool_responses_are_not_strict_enough(user_input):
    with pytest.raises(ValidationError):  # 3
        UserResponse(user_input=user_input)  # 3


class Summary(BaseModel):
    score: StrictInt  # 4


@pytest.mark.parametrize(
    'score',
    [3.4, '3', '4.0']
)
def test_only_ints_are_valid_scores(score):
    with pytest.raises(ValidationError):  # 5
        Summary(score=score)  # 5