#Circle.py
from math import pi 

class Circle:
    def __init__(self, radius, x, y):
        self.radius = radius
        self.x = x
        self.y = y
    
    def radius(self):
        return self.radius
    
    def center(self):
        return (self.x, self.y)
    
    def area(self):
        return pow(self.radius, 2) * pi
    
    def circumference(self):
        return self.radius * 2 * pi


#calc_circle.py
#!/usr/bin/env python

from Circle import Circle

hoop = Circle(3.0, 5, 6)
area = hoop.area()
circumference = hoop.circumference()

print area
print circumference