[Python] Python - trying to calculate digits of pi and cannot get past 48 digits after the...

I am trying to write a program to calclulate digits of pi using the Nilakantha Series in python. Every time it runs though it will not give me more than 50 decimals. Still learning python so any help is appreciated.

# Program using Nilakantha Series to crunch digits of pi
from math import *
from decimal import *

getcontext().prec = 200 # this is not doing anything

# epsilon is how accurate I want to be to pi
EPSILON = 0.000000000000000000000000000000000000000000000000000001

sum = float(3)
step = 0

i = 2

while abs(pi - sum) >= EPSILON:
step += 1
print (step)
if step % 2 == 1:
sum += 4.0 / (i * (i + 1) * (i + 2))
i += 2
else:
sum -= 4.0 / (i * (i + 1) * (i + 2))
i += 2

print (Decimal(sum))
print (Decimal(pi))
print ("Total itterations: ", step)
print ("Accurate to: ", EPSILON)

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