I rewrote the code for use directly in a Terminal by simply running $ python3 [scriptTitle].py [number of iterations to perform]
This code also prevents unnecessary iterations by checking when the last 10 iterations have not updated the accuracy of the requested number of digits.
"""
pi.py
# 2020 (C) Nikolas A. Wagner
# License: GNU GPLv3
# Build_010
-- Purpose --
Stress test CPU for its single-threaded performance
"""
# setting global variables
import time; import decimal
import os; import sys
txtPi = ""; final_k = 1; its = 1; n = 0
decimalArgs = decimal.Decimal(0)
validArgs = True; startTime = None
# evaluate the command line arguments and set flags for MAIN
def INIT():
os.system('clear && printf "Initializing..\n"')
global decimalArgs; global validArgs; global startTime
try:
args = int(sys.argv[1]); print(args)
decimalArgs = decimal.Decimal(args)
except:
print("""I can't do that! I need a whole number with no extra symbols!\n""")
validArgs = False; return
finally:
if decimalArgs < 34:
decimalArgs = 34
print('Sorry, but I can only be accurate from 34 digits onward.')
os.system('sleep 2')
elif decimalArgs > 10000000:
decimalArgs = 10000000
print('For the sake of your Terminal, I will limit you to 10 MIL. Edit code to change this if you insist.')
os.system('sleep 2')
startTime = time.time()
INIT()
# define functions; finally calling MAIN()
def getUptime():
return time.time() - startTime
def compute_pi(n):
global final_k; global txtPi
decimal.getcontext().prec = n + 1
its = n; n += 1
x = 0
C = 426880 * decimal.Decimal(10005).sqrt()
K = 6.0; M = 1.0; X = 1
L = 13591409; S = L
for k in range(1, n):
if x == 0:
print('calculating k= {0}..\n'.format(k - 1))
lastPi = decimal.Decimal(C / S)
M = M * (K ** 3 - 16 * K) / ((k + 1) ** 3)
L += 545140134
X *= -262537412640768000
S += decimal.Decimal(M * L) / X
pi = decimal.Decimal(C / S)
os.system('clear')
print('{0}\n'.format(pi))
if lastPi != pi:
print('Accuracy improved from iteration {0}'.format(k))
final_k = k
else:
x += 1; n+= 1
print("Pi not changed {0} time/s".format(x))
if x >= 10:
os.system('history -c && clear')
print(pi); txtPi = str(pi)
print("\n{0} digits of precision achieved in {1} iterations!".format(its, final_k))
return ""
def MAIN():
global validArgs
if validArgs == True:
result = compute_pi(int(decimalArgs)); print(result)
f = open('pi.txt', 'w+'); f.write(txtPi)
uptime = str(getUptime())
print("This took {0} seconds".format(uptime))
print("""
The last one to three digits are tentative
The decimal module rounds digits of precision rather than trimming them
""")
else:
print('INIT failed; please try again!')
MAIN()
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I rewrote the code for use directly in a Terminal by simply running
$ python3 [scriptTitle].py [number of iterations to perform]This code also prevents unnecessary iterations by checking when the last 10 iterations have not updated the accuracy of the requested number of digits.