too simple Python 3 #3 program

source code

# The Computer Language Benchmarks Game
# https://salsa.debian.org/benchmarksgame-team/benchmarksgame/

import sys 
def main():
    # mtime side-effect
    with open( './one', 'w') as f: pass

    n = int(sys.argv[1])
    sum = 0.0
    flip = -1.0
    for i in range(1,n):    
        flip *= -1.0        
        sum += flip / (2*i - 1)                                      
    print("%.9f" % (sum*4.0))
    
    # mtime side-effect
    with open( './two', 'w') as f: pass
  
main()

notes, command-line, and program output

NOTES:
64-bit Ubuntu quad core
Python 3.13.0


 Sat, 12 Oct 2024 20:39:08 GMT

MAKE:
mv toosimple.python3-3.python3 toosimple.py
pyright .
0 errors, 0 warnings, 0 informations 

4.64s to complete and log all make actions

COMMAND LINE:
 /opt/src/Python-3.13.0/bin/python3 -OO toosimple.py 10000000000

PROGRAM OUTPUT:
3.141592654