unittest Punto

import math

class Punto:
    def __init__(self,x,y):
        self._x = x
        self._y = x

    def x(self):
        return self._x

    def y(self):
        return self._y

    def distanza_da(self, p):
        dx = self.x() - self.x()
        dy = self.y() - self.y()
        return math.sqrt(dx * dx + dy * dy)

    def __str__(self):
        return f"({self._x}, {self._y})"