import math

class Ball:
    def __init__(self, xc, yc, ra):
        self.xc = xc
        self.yc = yc
        self.ra = ra
    def __str__(self):
        return "(({},{}), {})".format(self.xc, self.yc, self.ra)
    def __repr__(self):
        return "Ball object with center ({}, {}) and radius {}".format(
            self.xc, self.yc, self.ra)
    def area(self):
        return math.pi*self.ra**2

b1 = Ball(1, 2, 3)
b2 = Ball(2, 3, 2)
print(b1)
print(b2)
print(repr(b1))
print(repr(b2))
print(b1.area())
print(b2.area())

#In the shell,