Seasons greetings to all the geeks out there!

[spudtater]

Have a mince pi:

import random

def mincepi( num_iters=42 ):
    f = 0.0
    for x in xrange( num_iters ):
        if random.randrange( 2 ): f += 1.0 / ( 2*x + 1 )
        else:                     f -= 1.0 / ( 2*x + 1 )
    return 4*f

Yes, it's a randomised version of Leibniz' approximation of pi.
Brought to you by the Dept. of Wasted CPU Cycles.