Tuesday, October 12, 2021

Python Wrapper to find all primes from a given interval via sieve of Eratosthenes released as C++ procedure

 We intend to rely on https://github.com/mathbunnyru/python-cpp-extension . We also would to convert lists to sets and vice-versa and utilize method set1.difference(set2) . Sometimes Python tricks make you really excited 

Download and extract tarball on Fedora 34 with "C Development tools" and python-devel installed . Setup python venv in your working directory

 $ python3 -m venv .env

 $ source .env/bin/activate

and run straight away:-

$ python setup.py install

(.env) [boris@fedora34server python-cpp-extension-delta]$ cat deltaBetween.py

import cpp_python_extension
uplimit,downlimit =0,0
znBig = []
znSmall = []

uplimit = int(input("Input upper bound :"))
downlimit = int(input("Input lower bound :"))

znBig = cpp_python_extension.sieve_of_eratosthenes(uplimit)
znSmall = cpp_python_extension.sieve_of_eratosthenes(downlimit)

setSmall = set(znSmall)
setBig = set(znBig)

deltaSet = setBig.difference(setSmall)
deltaList = list(deltaSet)


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