pi is a Python script that computes each digit of the value of pi. As long as this script runs it continues to generate digits. As a matter of full disclosure, I did not write this. I am posting it here as a means of preserving the algorithm and making it available to others.

pi.py

import sys

'''
Added some modificationss
1. saving line for every 1024 digits.
2. notify if it scored million.
'''

def calcPi():
    q, r, t, k, n, l = 1, 0, 1, 1, 3, 3
    while True:
        if 4*q+r-t < n*t:
            yield n
            nr = 10*(r-n*t)
            n  = ((10*(3*q+r))//t)-10*n
            q  *= 10
            r  = nr
        else:
            nr = (2*q+r)*l
            nn = (q*(7*k)+2+(r*l))//(t*l)
            q  *= k
            t  *= l
            l  += 2
            k += 1
            n  = nn
            r  = nr
 
pi_digits = calcPi()
i = 0
data=""
loop = 0
prnt = 1000000
for d in pi_digits:
    #print(str(d))
    i += 1
    data += str(d)
    if i == 1024:
        with open("PI","a+") as pif:
            pif.write(data + "\n")
        i = 0
        data = ""
    loop += 1
    if loop >= prnt:
         print("I made " + str(loop) + " decimals (M)")
         prnt += 1000000
    if loop >= 5400000000:
        break