sloc.py

import pathlib
import concurrent.futures

def parse(path):
    cnt = 0
    with open(str(path), 'r', encoding='utf-8-sig') as f:
        for line in f.readlines():
            x = line.strip()
            if x and not x.startswith('//'):
                cnt += 1
    return cnt

def main():

    mypath = "C:/temp/ERP"
    result = list(pathlib.Path(mypath).rglob("*.[bB][sS][lL]"))

    with concurrent.futures.ProcessPoolExecutor() as executor:
        res = executor.map(parse, result)

    sum = 0
    for x in res:
        sum += x

    print(sum)

if __name__ == "__main__":
    main()