python并行

python并行 例子
1）

import multiprocessing
import time
def do_something(x):
    print(x)
    time.sleep(2)
    print(x*100)

if __name__ == '__main__':
    items = [x for x in range(1, 28)]
    pool = multiprocessing.Pool(28)
    pool.map(do_something, items)
    pool.close()
    pool.join()

1.2)

# -*- coding:utf-8 -*-
import multiprocessing
import time
def do_something(x):
    print(x)
    time.sleep(2)
    print(x*100)

def any(x):
    do_something(x)


if __name__ == '__main__':
    items = [x for x in range(1, 28)]
    pool = multiprocessing.Pool(28)
    pool.map(any, items)
    pool.close()
    pool.join()

2）

# -*- coding: utf-8 -*-
import time
from multiprocessing.dummy import Pool

def do_something(x):
    print(x[0])
    time.sleep(2)
    print(x[1])

x=[(a,b) for a in 'ab'   for b in  range(1,10)]
print(x)
pool = Pool(2)
pool.map(do_something,x)
print(2)
pool.close()
print(3)
pool.join()