# Multiprocessing:  Sharing data between processes (a Value or Array memory share must be created as processes do not share data by default)
from multiprocessing import Pool

def cube(number):
    return number * number * number


if __name__ == "__main__":
  
    # pool methods most often used: map, apply, close, join  
    pool = Pool()    

    numbers = range(21)
    results = pool.map(cube, numbers)
    pool.close()
    pool.join()
    print('Cubed results: ', results)