move-point-on-line.py

from dataclasses import dataclass

@dataclass
class Point:
    x: float
    y: float


@dataclass
class Line:
    p1: Point
    p2: Point

    def position(self, p: float) -> Point:
        return Point(
            self.p1.x + (self.p2.x - self.p1.x) * p,
            self.p1.y + (self.p2.y - self.p1.y) * p,
        )