#! /usr/bin/env python # Print digits of pi forever.## The algorithm, using Python's 'long' integers ("bignums"), works# with continued fractions, and was conceived by Lambert Meertens.## See also the ABC Programmer's Handbook, by Geurts, Meertens & Pemberton,# published by Prentice-Hall (UK) Ltd., 1990. import sys def main():    k, a, b, a1, b1 = 2L, 4L, 1L, 12L, 4L    while 1:        # Next approximation        p, q, k = k*k, 2L*k+1L, k+1L        a, b, a1, b1 = a1, b1, p*a+q*a1, p*b+q*b1        # Print common digits        d, d1 = a/b, a1/b1        while d == d1:            output(d)            a, a1 = 10L*(a%b), 10L*(a1%b1)            d, d1 = a/b, a1/b1 def output(d):    # Use write() to avoid spaces between the digits    # Use str() to avoid the 'L'    sys.stdout.write(str(d))    # Flush so the output is seen immediately    sys.stdout.flush() if __name__ == "__main__":    main()