python，多进程运行函数

# pip install joblib

from joblib import Parallel, delayed


def f(x):
    return x*x

res = Parallel(
    n_jobs=5    #根据cpu数量设置
)(
    delayed(f)(x) for x in [1, 2, 3]
)

#或者

a = [1,2,3]
res = Parallel(
    n_jobs=5
)(
    delayed(f)(x) for x in a]
)