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POStrange python queue behavior. Crashes if queue isn't named "queue"
 

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  1. POStrange python queue behavior. Crashes if queue isn't named "queue"
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    <p>The name kind of says it all. I'm writing this program in python 2.7, and I'm trying to take advantage of threaded queues to make a whole bunch of web requests. Here's the problem: I would like to have two different queues, one to handle the threaded requests, and a separate one to handle the responses. If I have a queue in my program that isn't named "queue", for example if I want the initial queue to be named "input_q", then the program crashes and just refuses to work. This makes absolutely no sense to me. In the code below, all of the imported custom modules work just fine (at least, they did independently, passed all unit tests, and don't see any reason they could be the source of the problem).</p> <p>Also, via diagnostic statements, I have determined that it crashes just before it spawns the thread pool.</p> <p>Thanks in advance.</p> <p>EDIT: Crash may be the wrong term here. It actually just stops. Even after waiting half an hour to complete, when the original program ran in under thirty seconds, the program wouldn't run. When I told it to print out toCheck, it would only make it part way through the list, stop in the middle of an entry, and do nothing.</p> <p>EDIT2: Sorry for wasting everyones time, I forgot about this post. Someone had changed one of my custom modules (threadcheck). It looks like it was initializing the module, then running along its merry way with the rest of the program. Threadcheck was crashing after initialization, when the program was in the middle of computations, and that crash was taking the whole thing down with it. </p> <p>code:</p> <pre><code>from binMod import binExtract from grabZip import grabZip import random import Queue import time import threading import urllib2 from threadCheck import threadUrl import datetime queue = Queue.Queue() #output_q = Queue.Queue() #input_q = Queue.Queue() #output = queue p=90 qb = 22130167533 url = grabZip(qb) logFile = "log.txt" metaC = url.grabMetacell() toCheck = [] print metaC[0]['images'] print "beginning random selection" for i in range(4): if (len(metaC[i]['images'])&gt;0): print metaC[i]['images'][0] for j in range(len(metaC[i]['images'])): chance = random.randint(0, 100) if chance &lt;= p: toCheck.append(metaC[i]['images'][j]['resolution 7 url']) print "Spawning threads..." for i in range(20): t = threadUrl(queue) t.setDaemon(True) t.start() print "initializing queue..." for i in range(len(toCheck)): queue.put(toCheck[i]) queue.join() #input_q.join() output = open(logFile, 'a') done = datetime.datetime.now() results = "\n %s \t %s \t %s \t %s"%(done, qb, good, bad) output.write(results) </code></pre>
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    1. USbigbenbt
    1. USbigbenbt
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      1. POStrange python queue behavior. Crashes if queue isn't named "queue"
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      1. VTUpMod
    1. COHow does it crash? Does it give an error message?
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      1. POStrange python queue behavior. Crashes if queue isn't named "queue"
      1. USBrenBarn
    2. COThe name has no effect, so you just messed up the renaming. Maybe there is a exception that gets swallowed in a thread, or you wait on a empty queue
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      1. USJochen Ritzel
    3. CO"it crashes just before it spawns the thread pool"? You don't even use the queue before spawning threads.
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      1. POStrange python queue behavior. Crashes if queue isn't named "queue"
      1. USJanne Karila
 

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