I'm taking the liberty of reposting this generator supplied by Pythonista
michel paul on Math Future. He's not the author though.
def pi_digits(n):
k, a, b, a1, b1 = 2, 4, 1, 12, 4
while n>0:
p, q, k = k*k, 2*k+1, k+1
a, b, a1, b1 = a1, b1, p*a+q*a1, p*b+q*b1
d, d1 = a/b, a1/b1
while d == d1:
yield int(d)
n -= 1
a, a1 = 10*(a%b), 10*(a1%b1)
d, d1 = a/b, a1/b1
More context:
https://groups.google.com/d/msg/mathfuture/LA0pMPC6-HE/MBGWxn4ENsUJ
Kirby
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