multithreading - python multiprocessing handling an array of numbers concurrently -


i have list of number:

a=[1,2,3,4,5,.....2000]

i have square each number , update same array, instead of writing loop want using parallel processing.

so squaring each number in array becomes process in itself.

expected output=[1,3,9,16,25,........]

how can achieve python multiprocessing library?

already tried use threading library code not fast enough, plus threading library not using cores.

you can use pool class multiprocessing module 

from multiprocessing import pool  def f(x):     return x*x  if __name__ == '__main__':     p = pool(5)     print(p.map(f, [1, 2, 3]))  #prints [1, 4, 9]

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