Haversine function written in Python 3.12

haversine.py

from math import radians, sin, cos, tan, sqrt, atan2

RADIUS = 6356.752

class Coordinate():
    def __init__(self, point_a: float, point_b: float):
        self.a = point_a
        self.b = point_b

    def __repr__(self) -> str:
        return "Coordinate<{0}, {1}>".format(
            self.a,
            self.b
            )

def haversine(coord1: Coordinate, coord2: Coordinate) -> float:

    pointone = (
        radians(coord1.a),
        radians(coord1.b)
        )

    pointtwo = (
        radians(coord2.a),
        radians(coord2.b)
        )

    deltaLat = pointtwo[0] - pointone[0]
    deltaLon = pointtwo[1] - pointone[1]

    a = sin(deltaLat/2) * sin(deltaLat/2) + \
     cos(pointone[0]) * cos(pointtwo[0]) * \
     sin(deltaLon/2) * sin(deltaLon/2)

    c = 2 * atan2(sqrt(a), sqrt(1 - a))

    return RADIUS * c # km