"""Compute the area/circumference of a circle"""

import math

# compare this version of area computation

def area1(radius) :
    temp = math.pi * radius**2
    return temp

# this one:

def area2(radius) :
    return math.pi * radius**2

# the latter is more concise, while the former may be easier
# to debug

def circumference(radius) :
    return 2 * math.pi * radius

# here's how to return multiple values from a function:

def area_circ(radius) :
    return area1(radius), circumference(radius)

if __name__ == '__main__' :
    area, circumference = area_circ(1)
    print area, circumference