python多任务及返回值的处理方法

废话不多说，直接上代码！

# coding:utf-8
from multiprocessing import Pool
import time

def keywords(title, content, top_n=5):
print u'关键词提取...'
print title, content, top_n
time.sleep(3)
return 0, [u"晴", u"多云"]

def category(title, content):
print u'文本分类...'
print title, content
time.sleep(5)
return 1, [u"天气"]

def run(title, content):
keywords_list = []
category_list = []
pool = Pool(processes=2)
q = []
q.append(pool.apply_async(keywords, args=(title, content, 5)))
q.append(pool.apply_async(category, args=(title, content)))
for item in q:
 r = item.get()
 if r[0] == 0:
  keywords_list = r[1]
 elif r[0] == 1:
  category_list = r[1]
pool.close()
pool.join()

return category_list, keywords_list

if __name__ == "__main__":
title = u"天气预报"
content = u"北京今日天气：晴转多云"
t1 = time.time()
category_list, keywords_list = run(title, content)
print "分类结果：", " ".join(category_list)
print "关键词提取结果", " ".join(keywords_list)
print time.time() - t1

或者：

# coding:utf-8
from multiprocessing import Pool
import time

def keywords(title, content, top_n=5):
print u'关键词提取...'
print title, content, top_n
time.sleep(3)
return 0, [u"晴", u"多云"]

def category(title, content):
print u'文本分类...'
print title, content
time.sleep(5)
return 1, [u"天气"]

def run(title, content):
keywords_list = []
category_list = []
pool = Pool(processes=2)
q = []
q.append(pool.apply_async(keywords, args=(title, content, 5)))
keywords_list = [w["word"] for w in q[0].get()[1]]
category_list = category(title, content)[1]
pool.close()
pool.join()

return category_list, keywords_list

if __name__ == "__main__":
title = u"天气预报"
content = u"北京今日天气：晴转多云"
t1 = time.time()
category_list, keywords_list = run(title, content)
print "分类结果：", " ".join(category_list)
print "关键词提取结果", " ".join(keywords_list)
print time.time() - t1

来源：https://blog.csdn.net/cdj0311/article/details/74640585