Leveraging validate_arguments to perform validations

validate_arguments.py

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 {}
    return None


@pytest.mark.parametrize(
    "url,retries", 
    [([1, 2], 3), (4, 'wrong_args'), ("http://fine.url.com", -4)]  # 2
)
def test_validated_get_payload_raises_a_validation_error(url, retries):
    with pytest.raises(ValidationError):  # 3
        validated_get_payload(url=url, retries=retries)  # 3

You are absolutely correct about the missing import. Thanks for pointing it out
And I appreciate the kind feedback :)