python多任务及返回值的处理方法

# 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

# 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