An example of use of pydantic decorator validate_arguments

pydantic_func_argument_validation_1.py

import math
from dataclasses import dataclass

from pydantic import validate_arguments, ValidationError


@dataclass
class Point:
    x: int
    y: int


@validate_arguments
def compute_distance(a: Point, b: Point) -> float:
    x = math.pow(a.x - b.x, 2)
    y = math.pow(a.y - b.y, 2)
    return math.sqrt(x + y)


p1 = Point(1, 2)
p2 = Point(3, 5)

try:
    print('distance between p1 and p2 is:', compute_distance(p1, p2))
except ValidationError as e:
    print(e)