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lucianmarin/wallis.pi.py

Created April 12, 2020 21:00
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Calculate pi
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wallis.pi.py
# pip install progressbar2
from progressbar import progressbar
def wallis(n):
pi = 2.
for i in progressbar(range(1, n)):
left = (2. * i) / (2. * i - 1.)
right = (2. * i) / (2. * i + 1.)
pi = pi * left * right
return pi
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