Python 2中的并发

Question

我在python3中有一个函数pre_raw()和pandas data train_raw.values我可以这样：

with concurrent.futures.ThreadPoolExecutor() as executor:
     executor.map(pre_raw, train_raw.values)

如何在Python2上编写它？

感谢。

Answer 1

procs=[]
for val in train_raw.values:
    p = multiprocessing.Process(target=pre_raw, args=(val,))
    procs.append(p)
    p.start()

for p in procs:
    p.join()