【已解决】请给我看个错误

hmchzb19

Exception in thread Thread-10 (most likely raised during interpreter shutdown):
Traceback (most recent call last):
  File "/usr/lib64/python2.6/threading.py", line 532, in __bootstrap_inner
  File "./url_fetch_threaded_part2.py", line 44, in run
  File "/usr/lib64/python2.6/Queue.py", line 168, in get
  File "/usr/lib64/python2.6/threading.py", line 232, in wait
<type 'exceptions.TypeError'>: 'NoneType' object is not callable

代码如下

1. 
   
2. #! /usr/bin/env python
   
3. import Queue
   
4. import threading
   
5. import urllib2
   
6. import time
   
7. from BeautifulSoup import BeautifulSoup
   
8. 
   
9. hosts = ["http://yahoo.com", "http://google.com", "http://amazon.com",
   
10.         "http://ibm.com", "http://apple.com"]
    
11. 
    
12. queue = Queue.Queue()
    
13. out_queue = Queue.Queue()
    
14. 
    
15. class ThreadUrl(threading.Thread):
    
16.     """Threaded Url Grab"""
    
17.     def __init__(self, queue, out_queue):
    
18.         threading.Thread.__init__(self)
    
19.         self.queue = queue
    
20.         self.out_queue = out_queue
    
21. 
    
22.     def run(self):
    
23.         while True:
    
24.             #grabs host from queue
    
25.             host = self.queue.get()
    
26. 
    
27.             #grabs urls of hosts and then grabs chunk of webpage
    
28.             url = urllib2.urlopen(host)
    
29.             chunk = url.read()
    
30. 
    
31.             #place chunk into out queue
    
32.             self.out_queue.put(chunk)
    
33. 
    
34.             #signals to queue job is done
    
35.             self.queue.task_done()
    
36. 
    
37. class DatamineThread(threading.Thread):
    
38.     """Threaded Url Grab"""
    
39.     def __init__(self, out_queue):
    
40.         threading.Thread.__init__(self)
    
41.         self.out_queue=out_queue
    
42.     def run(self):
    
43.         while True:
    
44.             #grabs host from queue
    
45.             chunk = self.out_queue.get()
    
46.             #parse the chunk
    
47.             soup = BeautifulSoup(chunk)
    
48.             print soup.findAll(['title'])
    
49. 
    
50.             #signals to queue job is done
    
51.             self.out_queue.task_done()
    
52. 
    
53. start = time.time()
    
54. def main():
    
55. 
    
56.     #populate queue with data
    
57.     for host in hosts:
    
58.         queue.put(host)
    
59.     #spawn a pool of threads, and pass them queue instance
    
60.     for i in range(5):
    
61.         t = ThreadUrl(queue, out_queue)
    
62.         t.setDaemon(True)
    
63.         t.start()
    
64. 
    
65.     for i in range(5):
    
66.         dt = DatamineThread(out_queue)
    
67.         dt.setDaemon(True)
    
68.         dt.start()
    
69. 
    
70. 
    
71.     #wait on the queue until everything has been processed
    
72.     queue.join()
    
73.     out_queue.join()
    
74. 
    
75. main()
    
76. print "Elapsed Time: %s" % (time.time() - start)
    

复制代码

linustd

<type 'exceptions.TypeError'>: 'NoneType' object is not callable

这句话已经很明显了，空类型不是可调用的。 肯定是你传递了一个可执行的类型，结果这个参数是None。

hmchzb19

也就是说out_queue是None,但是我没有看出来为啥是空的