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    <p>First, I'm not sure you understand what <code>join</code> does, if you're using it from a function called <code>terminate</code>. When you call <code>join</code>, all that does is make your parent process wait for the child process to finish. You still need to tell the child process that it needs to finish (e.g., by posting something for it on a queue, or sending it a signal), or you'll end up waiting forever.</p> <p>Second, the fact that you've left the <code>self</code> parameters out of your methods, used an old-style class, created a class attribute where you probably wanted an instance attribute, and started talking about global variables for something that seems perfectly suited for an instance attribute implies that you may have some misunderstandings about classes as well.</p> <p>But the big problem seems to be that you want to map string names to instance attributes (or some other kind of variable). While you <em>can</em> do this, <a href="http://stupidpythonideas.blogspot.com/2013/05/why-you-dont-want-to-dynamically-create.html" rel="nofollow">you almost never want to</a>. Instead of having a separate attribute for each name, just use a single <code>dict</code>, with a value for each name. For example:</p> <pre><code>class worker_manager: # ... def __init__(self): self.children = {} def generate(self, control_queue, threadName, runNum): if threadName == 'one': print ("Starting import_1 number %d") % runNum p = multiprocessing.Process(target=i.import_1, args=(control_queue, runNum)) self.children[threadName] p.start() # ... def terminate(self, threadName): self.children[threadName].join() </code></pre> <p>You can clean this up further by factoring out the common parts of the <code>if</code> blocks. For example, you might want a dispatch table. And, while we're at it, let's use more standard names, 4-character indentation instead of random, a new-style class, etc.:</p> <pre><code>class WorkerManager(object): # ... names = {'one': 'import_1', 'two': 'import_2', 'three': 'import_3'} def __init__(self): self.children = {} def generate(self, control_queue, threadName, runNum): name = WorkerManager.names[threadName] target = i.getattr(name) print ("Starting %s number %d") % (name, runNum) p = multiprocessing.Process(target=target, args=(control_queue, runNum)) self.children[threadName] = p p.start() def terminate(self, threadName): self.children[threadName].join() </code></pre> <p>There's probably a lot more than could be refactored if we could see more of your code, but this should be enough to get you started.</p>
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    1. POHow to use .join in this process
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    1. COYeah I am still learning python, I am playing around teaching myself from web tutorials. I tried to run it, but I keep getting this error NameError: global name 'names' is not defined I added a semicolon after your dictionary like I have in my source examples: names = {'one': 'import_1', 'two': 'import_2', 'three': 'import_3'}; and on the call it is self.names[threadName] THANKS SO MUCH!
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    2. COFirst, you should _definitely_ not have semicolons at the end of your lines in Python. If you're teaching yourself by following tutorials that do that… you need to find better tutorials (and maybe you should post the links here so others will know to steer people clear of those tutorials…).
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    3. COI am still getting this error AttributeError: 'int' object has no attribute 'getattr' I added the rest of my code most of it is just to develop the worker_manager class
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